I don't think I made generalisations; I did make an observation to try and provide a bit of balance, which isn't the same thing.

Buses are not easy vehicles to negotiate at the best of times and I'm sure it is an obstacle course for parents, the elderly etc. But I have to repeat in response to the assertion that it's only able bodied people that obstruct space for wheelchairs, that I've seen buggy users do the same - and even more annoyingly when the buggies are full of shopping. So let's please keep a sense of perspective about this. I don't think anyone wants mums to feel so afraid they can't go out - and there's no evidence that anyone was calling for that.
A civilised society should try and accommodate the needs of all - but it also requires ALL of us to exercise a bit of consideration and common sense.