Except that's literally only at Disney.
You can still do just that very thing (walk up, buy a ticket, have a good time) at every other park in Florida with no problems. Sure, you may be faced with questions at the booth like if you want a two park and what that entails at Universal or if you want to add the water park at Legoland but Disney is still the only one that requires dedicated research to ensure you can even get in on a given day, much less have a decent time.
To me, that's what seems crazy.
As someone who's been fully conditioned to jump through all the hoops for Disney*, this may come as a shock but none of the other places here are like that so my question to you is, why would the average person who "doesn't know better" expect that visiting a theme park would be such a pain in the a$$?
... Oh, and what Does Universal do regarding their most popular attraction? Charge $25 for people to ride it? Nope, they avoid even offering the standard express pass for that one to ensure that the standby only line moves as quickly as possible for all guests.
Anyway, the good news is apparently management has finally come to realize they need to scale a few things back and rethink the guest experience so there's hope, at least!
*We're all like frogs sitting in a pot of water that has slowly come to a boil saying "it's not that bad" but to the rest of the world, what we accept as the wdw experience is kind of lunacy.