I think each could learn some things from the other, frankly.
But you make it sound like that's somehow inexplicable. Disney was the gold standard for a long time, rightly, and many of its attractions still remain the very best of their genres. Which isn't to take anything away from Universal, which has several "best"s of its own.
Fundamentally, though, if a person doesn't like/can't ride the types of mega coasters the Universal (and plenty of others) will build, you can't expect them to be excited about those attractions. Does that mean these folks (and I'm basically in that group) should be talking as if what Universal does with its big coasters is objectively "bad" in conception and execution? No, but that's internet hyperbole for you.