Yep, conspiracy theories about attractions going down as a tool to push Genie+ aside, some of Disney's parks simply have no room for error.
It even makes it hard to do standard refurbishments when one missing attraction has a significant impact.
Disney also should consider building some attractions with capacity in mind. Universe of Energy was a great option to have because it was never busy, even on crowded days, and offered an extended experience. A friend referred to it as a "just do it" option on a busy day like NYE. It has been replaced with yet another attraction that lasts a few minutes with a long wait time.
Build more high capacity omnimover type attractions in each park. They typically see less wait times than coasters for example and offer a longer experience.
And what do you do with a kid who is under 40 inches in height on that side of the park?