> Notice the absurd number of young, frail people with canes and masks.

I don't notice an absurd number of young, frail people or young people with canes. There are a larger number of people of all ages masking than was the case pre-pandemic (especially outside of the ethnic groups where precautionary masking was common pre-pandemic) but...I don't think that's particularly a sign of changes in health status as it is of changes in perception of external environmental conditions and associated health risks.