If you do it in your thirties then the moments of self reflection and wealth of unfamiliar experiences will color the way you think for the rest of your life and career.

If you are OK with that train of thought, then you most likely won't bother going away in your 60s for any other reason (being old, not fit, family, kids… whatever). So, it all looks like an argument for people who don't want to ever get out of their comfort zone even though they can clearly afford it.