tons of pushchair users compared to fewer wheelchair users. If each of those pushchair users on the bus each have a day where they're struggling and refuse to fold, for them it's just one day. But for the wheelchair users, that's that many more people clogging up the spot they need on the bus. Your ONE TIME that you don't fold is just a part of the whole picture.
You don't fold, another doesn't fold, another doesn't move. You think "oh this one time, it's not that big a deal." But it's NOT one time. It's just one of many - as it's just one of many pushchair users.
I just do not understand why people cannot get their head around this. Sorry, but I just don't get the "I can't fold the pushchair, I struggle with it, I can't hold my baby and fold it, I can't ask people for help, I can't... I can't..."
FFS people! Practice folding the pushchair at home (I did, even holding the baby - looked silly, but boy, did it help). Ask for help. Use a sling. But stop acting like your legs and arms are going to fall off if you have to fold your pushchair and hold your baby. (although hey, bonus - if they do, you can get a wheelchair and then actually use the spot PROPERLY!)