The people who like popular porn don't really go around announcing that they love professional-grade porn. They only do so when talking about the ethical consumption of porn, and their focus is on supporting people for their work, not the appreciation for the high quality or enjoying the financial transaction.
Announcing you like amateur porn is a statement about the flavor of porn you like, and it's pretty clearly a minority opinion, given what we see reach the tops of the porn forums.
I pretty much only like amateur porn. But you know what? I'm not going to stop anyone else from enjoying the kind of porn they like. Why should I? If you like professional porn, great! If you don't, that's okay too. Neither side should judge the other so long as they're not promoting harmful behavior of one type or another. There's nothing wrong with making a living by getting naked, there's nothing wrong with doing it for fun!