No one thought that, as in my case and long before health and safety made everything easy for the younger generation of softies, where even watching a TV program had to be preceded by all sorts of warning on it's contact just in case a clown may appear, or a naughty word is uttered, that we did bloody hard physical work which meant to many of us arthritis was a result which makes getting around pretty painful.
I am in my 60's and will still give up my seat to an older or pregnant women and anyone with a walking aid, why wouldn't you. But painful ailments do not always necessitate the use of a walking stick but we still manage to get about. Yet the younger generation and I speak from personal experience, get a cold, stub their toe and need time off work to recover.
As for blaming the young for everything surely it is the reverse as we oldies are accused of practically bringing society to its knees or at least the health service because we have the temerity to live longer and none of our leaders saw that coming. Still one thing is for certain you will all be old one day, you will all probably have long term medical issues and perhaps be grateful when someone offers you a seat.