Isn't the point of these toilets that there is extra space for manipulating a wheelchair and/or a carer, and also washing facilities? I need a toilet with a basin and it's hard to manage without one, but am glad that my problem isn't obvious.
Anyone can develop a sudden problem and need to go quickly but being 'disabled' doesn't mean that one needs a toilet available instantly and at all times. Yes, maryeliza54 I do know what changing a bag and maybe having soiled yourself might involve, but an able-bodied person is usually pretty quick so wouldn't cause much delay.
If I find that there is a queue but the 'disabled' is free, I say that I need that one but wouldn't anyone else like to go first? I get very stony looks when all I'm trying to do is reduce the waiting time for all.
Blue Badge is quite different. You park and leave the car, so you can't see when a person comes with a genuine need for the space.