I'm the stereotypical reclusive, clinically shy geek, but I've gotten past puberty, and stopped considering penetration to be the "end game". Note that those douchebags seem to be exclusively care about that, there's no "relationship artist" trade that I'm aware of.
The reason those books recommend going out multiple times a week, isn't to have that lifestyle per say, it's because that's the only way to accumulate enough hours at practicing these social interactions to internalize it. Once most people reach that point, they stop going to clubs and spending all that money. Then they use the skills they learned through trial-and-error on strangers to date people in their social circles.
If it's from sleazoid to sleazoid, okay, let them simmer in their own subcultural juices. But as you say, a part of the reader demographics is oriented towards the socially insecure, and there this approach can be damaging (and seems inherently exploitative to me). There are other books about this, from targetign the shyness angle to basic social interaction ("shmoozing") to flirting – or to bedroom performance, if you're concerned about that. You don't really have to reach for the "seduction community" shenanigans.
Apart from the moral/ethical angle, there's also little actual value in that part of the bookshelf, from what I have seen. It's bad self-help, coupled with huge amounts of self-promotion (to establish the required credibility of the author). I'm not saying that it doesn't work, mind you. Not necessarily because of the clever tricks and lingo, but because of the basic confidence boost. "You can do it!" is probably all a lot of people need. Just like lots of diets or GTD type of books work just by the customer deciding to watch what he's eating or trying to organize his life.
Still don't think you should hand your money to that sector of virtual wing men… Maybe all joking aside, we would benefit from a "advanced social skills" Hacker News (There's probably a subreddit for it already).
No one is advocating buying into their whole philosophy. But as I said in a parallel thread to this one, unfortunately those guys have developed the most accurate and detailed model for modern day social interactions that I've seen. After I knew what to look for in terms of body language, group dynamics, etc. the difference was night and day.