I won't disagree with you at all. The PUA community is full of all sorts of men. There are men that are here to increase their confidence and social abilities to the point where they can actually get off of World of Warcraft and go out and talk to people without having panic attacks and there are guys that are here to increase their power in the board room. I think that PUA has definitely increased a lot of guy's sexual lives, so I don't think that it's silly at all. David Shade (a guy who's stuff you should really read because of your reason for being here) bases all of his work on sexuality. He doesn't really teach how to pick up girls, but the stuff he teaches has helped me do it much much better and same as a lot of other guys.
As far as morals go, again you have a lot of different guys, you're gonna get a lot of different moral viewpoints. Personally I'm almost 23 and I'm still trying to have sex with a 17 year old, before it gets to be too creepy for me. Some people probabaly think that that's already creepy, but who the fuck cares, I've got my morals and they can have theirs. It's an attitude that you really need to adopt in order to be a great PUA; you are your own person, you have your own morals and that is what matters, because everyone else has their own morals as well and respecting that will take you far.
If you can't think like that, well you're gonna have some trouble, because everyone has their own quirks and you're gonna run into people who you find questionable, but they have the best knowledge, they just kinda went crazy from it all. Take my advice and learn everything you can, from everyone you can and then use the knowledge according to your own set of morals. Knowledge is like a car, the car isn't evil, but if you decide to use it to kill people it can be, or it could be good and used to get you to work in the morning. Same thing with NLP and any PUA knowledge/skills/tactics, they are merely tools and it is how you use them that define what kind of man you are.
Myself, I am here to have the ability to be able to make the girls that I meet and really like, like me back as much. I don't intend to go out every night and fuck as many women as humanly possible, but I have no problems with promiscuity Hell I used to be a porn star for about half a year, but what I'm after here, is to be able to get "the one", when I see her. Also, an unboring sex life is a must.
