I think you are missing the first half the modern male reproductive lifecycle. What you are saying increasingly applies to 30's onward (when males are looking for long term family relationships) but for the 20 somethings many are looking for these shallow, vacuous women because they often can be convinced into meaningless sex. It's a pretty sad state but it appears to be this way now.

Wowsers. I don't think you're supposed to say this out loud.