I think they put the well known dinosaurs across all rarities so that earlier game players dont have to wait a long time before they get to use the dinosaurs they like eg.: pachyceph, trike or dilo with them being rare and common.
i also thought about this and i think it does in a way matter for the movie fans. and as shallow of a problem this is, i was really upset about this for awhile as a fellow jp movie fanatic lmao.
though i think this is why they did the gen2s for the players who have felt this way about those famous dinos. so that those lesser rare dinos would have value thus making them tournament. at least thats why i think they did.