This.
The whole point of a theme park is to transport guests to a place they wish they could go (e.g. Neverland, an idealized Hollywood, Hogwarts, etc.). Dinorama successfully transports guests to a place they don’t want to be. They literally spent thousands of dollars and likely travelled hundreds of miles to go to an upscale theme park resort instead of hopping in the car and driving to their local rundown cheap amusement park.
Of course, Disney didn’t pick this theme because they thought it’s what guests craved. They chose it because it allowed them to throw up a few attractions on the cheap. Which is fine as a temporary measure to increase capacity, but an upgrade is long past due.
There's a little more to it - Chester and Hesters is meant to be, believe it or not, a sort of Morality Play that draws into focus the difference between this environment and the others in the park. The lands that have living animals are beautiful, intricate, mysterious, and natural (or at least natural-feeling). But DinoLand? Dinoland's animals are long gone, and look what's become of them.
We have an endless fascination with dinosaurs that, due to their extinction, can never be satisfied. They "live" now only in museums and roadside attractions - which may offer some fun distractions, but will never compare to those amazing beasts. While it's not our fault they're gone, the way we've commodified their memory is cheap and tacky - the antithesis to the grandeur the natural world presents when unfettered by our influence.
Did it help that Chester and Hesters was inexpensive to build (and easy to tear down)? For sure, yes. But it does also makes a somewhat poignant comment about our ecosystem. The things we lose from it can never be properly replaced, they can only be protected while we have them, and the value of protecting them is evident when comparing which parts of the park appeal to which parts of it don't.
. . . That said, your assessment is ultimately correct that it's undesirable to be transported as a guest to a place you don't want to go. Especially when the subject is something as cool as
dinosaurs - people want a Jurassic Park moment and they do
not get it here. Only "Dinosaur!" comes close to delivering the goods and it's not quite enough.
That this interesting message the land presents goes far over mosts guests' heads is also a big part of the problem - The Design Goal and the Guest's Desires are absolutely speaking past each other.