I wrote the above last night and I had some more thoughts on it, to really drive the point home to the purpose of this forum.
So, continuing with understanding the context, what is the context of western society with regards to relationships?
For instance, the implicit assumption that monogamy is the best and most healthy form of human romantic relationships (even if polygamy or simply "sleeping around" aren't explicitly labeled with their own disorders).
Also, that monogamy should be the goal of any emotionally healthy person from sexual maturity onward (and not allowing for a player period or hoe period, respectively).
All of this culminating in the ultimate goal being the ability to maintain a lifelong relationship with one partner where you raise children together (as opposed to a one man / four woman group, and as opposed to other "legacy projects").
Of course there are certain psychologists and certain schools of thought that are more flexible on any or all of these, but for the overall diagnostics (DSM), this is largely true.
So the question then becomes are the set of behaviors and beliefs that are most valued in western psychology, where the goal is one (beta) man to one woman, the most effective or useful if say your goal is one man to four women (as it is in some other societies currently, and as it was pre-Christianity with anywhere from 2 to 10,000 women to one man) or simply to go through a player period till you can understand women generally before making an informed decision about one woman in particular? (and, a personal theory of mine is that a man has to have more sexual experience than his female long term partner to avoid being taken advantage of.)
And would the DSM label behaviors that lead to one man and four women as disordered i.e. (perhaps, and to an extent) "dark triad"? Despite one man four women being an evolutionary stable, and very effective, strategy (just look at the spread and perpetuation of Islam).
And, in my opinion, wouldn't it be more effective to separate out the good behaviors of dark triads, while discarding the bad? Further, considering the bias, the bad parts of dark triad going along with the good may be a caricature i.e. what about the benevolent Machiavellian who does everything necessary to protect his family and people (dare I say, the "Prince", haha).
Also of note, overall western psychology in some ways has to minimize the antagonist nature of sexual reproduction. In many ways the interests of men and women are not aligned at the beginning of seduction (fast sex vs. slow sex for an obvious example), and while pickup tries to address this and find common ground and alignment (and persuade), western psychology acts like this doesn't exists at all.
Or to put it more concretely, does it make sense to be more "dark triad" in the beginning of the seduction as opposed to after you've slept together? By the way, it's my observation that many so called players get this wrong and can't form stable relationships (which require empathy, accountability, honesty etc.). And, to show the agreement with the prevailing doctrine, people high on narcissism tend to have more short term relationships (and be better at forming them) and I believe by extension one night stands.
Finally, to agree some more with
@Carousel, does it make sense to be more Machiavellian with strangers or people whose motives you don't know and whose interests with you may not align? Which is a connected to a point I'm fond on, "Politics isn't scale free" i.e. Capitalism is a better system among strangers (it assumes the worse), Socialism among family and friends (it assumes the best).