I believe you are on-point.
In fact, I have a sneaking suspicion that PUAs camouflage their inability to KEEP a woman in an LTR by claiming they are not interested in LTRs and only STRs. But even if they wanted a faithful LTR, they probably couldn't maintain one.
In THE GAME, Mystery in fact could not successfully maintain LTRs and fell into some serious funks because of it.
With that said, I have a few observations:
1) Many PUAs do come off as effeminate. I think this is because naturally manly men don't have to learn PU - as women naturally flock to them. Similar to how smaller guys tend to gravitate towards martial arts - because big guys don't need it as much.
2) A lot of Mystery's techniques are crossed over from his training as a magician. Stage presence, stage angles, stage positioning, flamboyant costuming, working the crowd, etc. Obviously, this all suits him better to night game than day game.
3) Yes, I think even Mystery has said that women are attracted to a "leader of men." And, he certainly preaches what he practices...
So, that's not a knock against him - but a further testament to his Game, actually.
4) I think his Game works better on upper-class suburban White girls who are more accustomed to metrosexuals...but wouldn't work as well on other types of women looking for more rugged men.