There's only one issue I can think of with your idea that someone who is 75 now leads a life as you're describing.
The generation they belong to are predicted to live to what 80-85 years? Whilst we (assuming you're in your 40's now) are predicted to get to what 90-95 on average?
Average lifespans are increasing, and on top of that the mobility of someone who's 75 now, won't be the same of someone who's 75 in another 35+ years.
The generation they belong to are predicted to live to what 80-85 years? Whilst we (assuming you're in your 40's now) are predicted to get to what 90-95 on average?
Average lifespans are increasing, and on top of that the mobility of someone who's 75 now, won't be the same of someone who's 75 in another 35+ years.