I thought it was going to be because the film's got an anti-corporate message baked into it. It's a warning against letting profits control nature. Moreso the book because Crichton believed in God, but the movie's still got a good thesis.

Nope. Director says the first filmed couldn't be franchised because the story didn't lend itself towards humans and dinosaurs coexisting. Yeah no shit, the first movie makes it plainly clear that bringing dinos back to life is an affront against nature and is inherently uncontrollable.