I’m 71 and have neuropathy, chronic pain syndrome and associated crap that comes with it. I’m sorry to hear you’re feeling less worth because you can’t do for others or maybe that choir you can’t do for yourself. Is this a healthy way to view yourself? NO! Let’s try flipping the switch on what you’re trying to do to make you feel worthwhile. I do the cooking and shopping for my wife and I but as my body continues to fall apart I adapt. I no longer shop myself but by computer for delivery. I cook but do it in small steps along the day so I’m not standing over a counter prepping for 15-30 minutes at a time. Ouch!
You spent 40 years as an executive providing some benefit that allowed you to earn money. Obviously you’re an educated women that I presume can still use a PC, which should enable you to either do positive things for yourself or others if your physicality permits. My wife over Covid lockdown did ESL tutoring for Nationality Services Center via zoom. You can read books for the blind or other remote services that you might be able to contribute to for people who cannot. You can enjoy yourself by reading books, newspapers, do puzzles, communicate with others via Mayo Forum, etc. as a way of remaining relevant as you have been in the past.
For me since pain is my steady companion I do everything everyday that I can to keep it at bay. In other words I come first which for me was difficult to put in motion having been a nurse for 40 years and used to taking care of others. You only have one life so why not enjoy the free time you have for yourself. I hope I did not carry on too long and bore you.