Not true; if you re-read the post, I was referencing someone's argument that these folks are doing it because they "just love to fly"..inferring that for some in this demographic, there is not longer a financial necessity to fly professionally..just a 'hobby job' to keep them busy during what should be retirement years (and are for almost every other profession...Supreme Court Justices excepted).
Now as for safety; would you want to 70+ cardiologist cracking you open? Given: he has about as much wisdom in his profession as one can have, just like similarly aged pilots. Both professions, however, require a steady hand with fast reflexes. They also require good short-term memory, and above average cognitive ability.
I'll be the first to admit: when I near my 70th decade on this ball of mud, I don't expect to meet the above physical standards (father time usually doesn't allow it), and will be enjoying my family and free time.
Granted, with the proliferation of automated flight decks in the last 50+yrs, a pilot can still maintain a minimum level of proficiency into more advanced age ranges. Father time, however, doesn't miss anyone. He may get to some earlier than others, but he maintains a 100% completion factor.
When you near our 70th decade, you're gonna be REALLY old.