I am not disabled, nor do I have a disabled child. I do know a bit about the campaigning that has been done and the very very few rights disabled people have in a society that really disregards the needs of disabled people.
But another feature of that fight is the recognition that impairment is different to disability. And that it is society, ie the rest of us, including crap planners and designers and shop owners, who 'do' the disabling. I also get the point that many impairments are lasting and require management and care from others in quite a different way to caring for children.
So yes, it is the responsibility of able-bodied parents not to act like 'princesses'. And therefore not to use disabled toilets unless absolutely necessary.
But, once again, it is NOT a valid argument to respond 'leave the door open', 'put your baby on the floor' 'sit with them on your knee'. As I posted earlier, there are many reasons why this is not possible, desirable or a good idea. Parents with babies and pushchairs are not 'disabled' but they are socially excluded, for short periods of time, in this respect by the poor planning of inadequate toilet facilities.
I agree, parents should not be individually 'needy' and should indeed get off their arses and campaign for better public toilet provision.
None of what I have said should be taken to imply I think it is OK to willy nilly use disabled toilets: I don't. But I do think there are often circumstances where it is entirely understandable that people do and I don't think they deserve the lashing they are getting on here.