when i was younger i thought the real horror of Jurassic Park was dulled by the revelation that the dinosaurs were not, in fact, "real" dinosaurs due to the introduction of the frog genetics, but now I think it's a crucial part of the horror that many of the later entrants in the JP series lost track of.
because the thing is that the park itself is a simulacrum of a past world -- it's not actually an accurate recreation of the past, as Ellie Sattler points out. The dinosaurs can't really live in a modern world, they have to be slightly modified to do so. the sense of control was always false. all the safeties failed because they were based on predictability, and predictability was already thrown out the window in the moment of creation.
the horror of jurassic park is that they didn't create dinosaurs, they created something that kind of looks like dinosaurs and kind of acts like dinosaurs but aren't dinosaurs. the horror is that even if you think they'll act in predictable ways, they won't, because chaos has already been introduced into the equation.