Because if you don't publish in academia, you might as well be dead. And the terms for most places to publish are similar.

It's a racket.

Ok, then next question is why are you in academia? To share knowledge with humanity, bring the Promethean light to the mortals or something I guess. But then if they use it for productive things that make money, that's too smelly, that's too practical, too dirty, or what?