Very good @lucylin ...
"Interestingly, it was the answer to this very question of 'value and point of life', that eventually nudged me to get off my lazy arse, and do something again."
"I must say, it's made me feel 10 years younger. That says a lot in my book.."
... I respect that. For me and my beloved lifemate, we are very early into this "chapter of our lives," so I have already given considerable thought myself as to what's next. While I may work again, of one thing I am certain. Only "at the point of a bayonet" will I ever again work somewhere that is unhealthy, e.g. life sappingly stress inducing ... I simply don't have to ...
That said, we are clear we are blessed still with good health and can make contributions, as seems best to us. The day will inevitably come, no matter how well intentioned we may yet be, we simply will no longer be able to ...