If the dinosaurs depicted as monsters made sense because it was explained in a few dialogue lines, so would have feathered dinos ("we updated the old InGen genetic blueprints and replaced the frog dna with newly sequenced dinosaurs/with birds, because they are closest living relatives"). That's all it would have taken to get it to "make sense" - as if much of the movie did, anyway.But it would have been a very different movie, and probably the producers decided it would not sell as well as a monster movie. And that's fine, but I personally would have enjoyed the different one more.