Because having to take a treacherous detour close to a possibly gator-infested lake, over very difficult terrain you don't have the means to easily pass over, is "less than catastrophic" when you personally aren't the one being inconvenienced so. This reeks of ableist privilege.
It's right there in the photo you're looking at. That's not firm, compact dirt next to the sidewalk. Are you just going to ignore the first-hand account of an ECV getting stuck in it?
The entire thing is sloped and not easily traversed in a wheelchair. And yes, I can make that analysis from experience, but it really shouldn't be required.
You don't need to be there "live." This is all quite obvious even in a photo. And you're just going to
assume there were signs? Because it's Disney? Really?
It's a moot point to you because it was never your concern to begin with. You're more concerned with being a Disney apologist than the welfare of their guests.