I think we've gotten too invested in the idea that every ride needs a story with proper narrative structure, but they don't. Trying to shoehorn one in to every ride has actually been detrimental to some of them.
See: Gringotts: Did not need a conflict. A whimsical wild ride on the bank vault carts like we saw in the movie would have been enough. Instead, we are denied that whimsical ride in order to watch the conflict play out.
See also: Flight of Passage. No conflict, and the ride is tremendously better for it than if they had instead been like "Oh no, your flight has to be cut short because (whatever the bad guys are called) are attacking! We need your support!" (which is likely what Universal would have done).
And: Haunted Mansion. No narrative, but it does use the three act story structure in how it presents things to you.
In other words, rides need pacing but don't necessarily have to have a hard-defined narrative.