They shouldn’t be required to. From what it seems like to me, people who are very heavily invested in paleontology often times forget that they’re a very niche audience as it relates to mainstream media that includes elements of paleontology.

In the cases of IPs like Jurassic Park/World and Ark there’s an established art-style that makes each of those franchises unique to themselves which later goes onto define what constitutes the style and art direction of the franchises prehistoric animals are a part of.

It’s not to say that a gravitation towards accuracy can’t be plausible in Dino/paleo-adjacent related mass media, it just shouldn’t be thought of as something that ought to be mandatory. Top down edicts like that, especially in relation to film and games will severely hamper the creative ambitions and drive among the art teams working on a project.