Dino DNA

Apparently they have found some soft tissue of a T-rex in a fossil. That's pretty interesting. Explain to me why the hell it's so important to learn about how the dinosaurs lived and died? Sure, curiousity, but then what? I mean, people have no problem funding research like this, but when it comes to potential life saving research for humans, it's a debate?

Anyway, I thought that they already know everything about dinosaurs. I mean, didn't they make that documentary, what was it called? Jurassic Recreational Area? Whatever, I heard it was only in the theaters for a week or two.