I suppose it is true that societies over time develop normative standards for appropriate behaviour, and such standards are enforced through social disapproval towards those that don't follow the rules. The real reason for not pushing seniors out of the way is that it would be cruel and disrespectful, but social enforcement of such standards could well improve the behaviour of people who would be too self-absorbed to care. So maybe that's not such a bad thing.

I think what I'm really trying to stress is that we shouldn't substitute political correctness for actual reasons. Rather than teaching people "don't do that because we disapprove" we should try to teach them to actually have concern for others, if at all possible.

I can see your point though, my statement could be misleading.