Jurassic drew people into movie theatres looking for dinosaurs, not movie stars. Thankfully, CGI's appeal has been fleeting.
Visual effects are merely a tool that aids in the telling.
Without a story you've got nothing. Paul Verhoeven has made an entire movie built on a simple premise. Mankind goes to war with bugs at the other end of the galaxy. Suffice to say, they don't like us and we don't like them. The trouble is that the cast is almost entirely made up of Z list nobodies who just don't have the necessary charisma for the big screen.