Short answer... Because drumming and social skills are completely dissimilar and I'm sure we all know what a woman is and where we all want to hit it.. oh, i mean her
Some of the best advice i have read from the limited selection of PUArtistry material I have read is exactly what i quoted. This is basically, get out and start talking to girls. You can read every book there is on the subject and unless you take that one step you will NEVER succeed as a PUA. I'm also not sure, but I'm sure Style himself can be quoted (or paraphrased really) - in his book somewhere to say, "it doesnt matter WHAT you say while talking as long as you are saying something [imo=trying]" This is aka the 90-10 principle isn't it?
Further, I NEVER said anything about books being a BAD resource or a BAD place to start, just that IMO getting into the real world and experimenting with various openers and pushing yourself fuels one with such a high that it is likely going to propel one's interest in PUArtistry for some time. I'll be honest though, books have this effect on some as well.
I suppose in the same vein you can read every possible book there is about drumming but unless you make that first beat with your drumstick, no band, nor anyone else, would respect you as a 'drummer'.