Seeing as AspiringStoic neither seems curious about alternative methods, nor wants to discuss things in good faith, I see no point in continuing any further communication with him.
If you're indeed getting success, then I'd say you're experiencing mastery, which is a key ingredient for gaining any skill. If that's the case, then I'd say that you're on the right track, so just continue what you're already doing.
If I were you, though, I'd still try to see what getting good at general socializing can do for you in terms of social momentum and likability, and how it can make you into a guy who's ready 24/7 instead of just a few hours a day. It isn't hard to do either. Just do some situational openers if luck hands it to you. And practise doing observations or mini cold-reads with anyone in your vicinity or with anyone who comes into your "bubble".
See, so this is why I say that I "don't approach". I mean, of course I still approach, but it's more subtle, because I never have to "man up and go over to her," as it were. I just chat to people who naturally come into my zone of socialization, so to speak. Moreover you don't need to allot a special time to do this, IMHO. You should do it every time you go out. Suddenly, you'll find yourself in situations where sexual tension is growing, and you realize that you're in full control of it, because all you did was to be social and have a good time.
Perhaps there is more to it. Perhaps I've learned to better see IOIs and to handle various protests, or mini-rejections, or scepticism from people. But generally, when I act like this, people are really forthcoming and happy about speaking to me. This makes it easier to get in a good mood, which makes it easer to flirt. So, it's a thing that gives you sort of self-driving social momentum. And since no interaction essentially matter in any meaningful way, since I'm not out to get anything in particular - I'm just testing the waters, and seeing where things could lead - then even if I don't get a date that day, I'm still happier for doing it. Which is attractive in its own right. Meaning that those times it works, it feels completely effortless. Yes, like a natural. But like I said earlier, I'm not a natural. I had to learn how to get here through exploring new ways of communication and approaching.
Nervousness builds when you need to achieve something. When you feel the need to perform. Being generally social takes the sting out of the need to perform, and skews it into being just curious, or just making a little flirtatious observation, and then having some fun that doesn't need to lead anywhere. But when you take on that frame, there's a much higher chance for sexual tension to develop since you're being naturally playful and happy, and hence it will also increase your closing rate regardless of how you made the initial approach.
When you do traditional approaching, the first step is noticing the girl, then the next thing is coming up with something to say, unless you use - say - the three second rule, and try to come up with something as you go over there. If you've got a routine, then it may or may not be easier, unless you're still thinking about how you should deliver that routine, or worst of all, you're struggling to even remember the words, because her beauty blinded you or something. None of that matters during general socialization, because you're just having fun and experimenting a bit.
You can look upon the need to perform as a begging frame, meanwhile the frame you want to be in, is the giving frame, or in the least the curious and qualifying frame. These are just concepts to describe your mental state. IMHO it's easier to get into those frames or states if you already are having fun, and you are - to put it in RSD terms - self amused.
Absolutely. That's where they work best. And due to this effect, women recognize it as such, and then it even helps you along. She recognized that moment from that romantic comedy, and can go "Oh shit, I'm now the protagonist in this beautiful romance!" Meanwhile you can act the hero. IMHO it's quite beautiful! And you can do this! In fact, a good starting movie to see is Don Juan de Marco. Copy everything Johnny Depp does in that movie lol! For funzies of course. For a laugh. But try it anyway, to see how the girls react when you use stuff from that movie. He's being a total romantic fool, but - having tried this myself, and mind you I look nothing like Depp - it actually works. (I took a deep dive into this movie after I saw Zan Perrion recommend it back on MASF, back in the day. What a legend!)
Being nice and social to more people does not require much skill IMHO. So, I would say, no, you don't need to put in a lot of work, actually. Unless you have social anxiety in general. But then you really need a therapist too.
What you need to learn to recognize is the opportunities it creates, and how to capitalize on it, and that's inner game work mostly. "Ah, this girl stayed and talked longer hmm... What would happen if I took her hand, or asked her on an insta date instead of chickening out?" That sorta thing. "Next time I'll try to capitalize on it!" So, as you can see, this is not so far off from regular daygame either. But hopefully you're managing to shift the angle of it a bit, or see it in a different light, where it's part of your entire life and not something you must assign a special time of day.
So, final words, of course continue learning traditional cold approaching and daygame. It's a good skill to have. I never claimed otherwise. But I would also challenge myself to try out these new ideas as well, to see where it leads, and if it feels good for you. If it seems horribly awkward and weird, then, fine, go back to traditional daygame. But if not, I simply wish you a happy life - full of romantic adventures that end in hot, steaming sex with super-hot girls due to ST overload.