that may all be true, but the fact is: In the movie the 'Velociraptors" were potrayed in that way, not the real way. they may have been based of another dinosaur, but they were still called a velociraptor.

And they evolved as the series progressed, didn’t they?

Also, the books were written in the late 80s and early 90’s, being published in 1995.

Back then, this part of the world didn’t believe any dinosaurs had feathers at all. So, in that respect, they are a bit correct in their portrayal in the film.

They are pretty much just naked, just missing the feathers we now know they had.

And we both missed a huge point: They were mutant replicas of dinosaurs.
Their DNA was spliced with that of some unknown amphibian’s. No doubt the feather gene would get misplaced, damaged or completely destroyed and replaced in the splicing.