Earlier quoted context omitted.
True, but there are wannabees in every field where the people who succeed become rich or famous. There's nothing newsworthy about that sort of background radiation lameness. Or more precisely, it's one of the recipes for an Onion article.
I thought I had read something you wrote once (5. Most investors are momentum investors. from http://paulgraham.com/guidetoinvestors.html ) implied that investor demand increases the volume of the more shallow type of copycat.
Investors are herd animals, but they're not the reason mediocre founders copy existing ideas. Mediocre founders copy existing ideas for the same reason mediocre people in so many other fields do: they're insufficiently imaginative.