The situation specifically about the bathroom is equitable because when my daughter had to use the bathroom on splash mountain two years ago, we were guided out of the line so that she could go and then guided back into it when she was done. There wasn't even a return to Q time. So in that case, bathroom related issues are being treated equitably.
The bigger issue with your example would be if somebody on the transplant list should really be stuck in a line with everybody else and their germs. The situation there would be different and should be presented as such to DAS. " My child specifically cannot wait in line surrounded by a bunch of people because they are on immuno suppressants, and being an a line with all of those people and their germs would be life threatening to my child". I have heard horror stories of situations like this not being approved on tiktok but i'm not really sure how much I believe them. That place can be a cess pool.