I agree that not all older people need a priority seat, before my husband had a stroke in his mid seventies he would offer his seat to a person of any age who looked as if they were struggling, after all priority seats are not just for older people, some are pretty fit fit their age. And not all entitled passengers are parents with children. It goes right across the board.
Now my husband needs a priority seat but if is one nearby I won’t insist upon it, only if the bus or train is packed will I do this.
The thing is my husband isn’t just disabled, he looks disabled, some don’t, so I can understand some confusion, but my DH can only shuffle forwards holding a stick whilst I hold his other arm, yet still sone people can be loathed to give up a seat whilst others will jump up immediately.
It seems if some people have paid for a ticket they think they have to hang onto a seat at all costs or maybe they just can’t be bothered to stand. Have even seen a woman sitting next to a teenage boy, presumably her son, put a hand on his arm in order to stop him giving up his seat, which was mean. But that’s life.