You need not to worry about him at all. There will be more than enough divers to take good care of him above or below water if he decides to go diving.This thread has had a significant and unexpected on my outlook regarding scuba.
After I participated here, I saw clips of Charles addressing the nation. I looked at that feeble old man and wondered what it would be like for a DM on a dive boat to see him climbing on board at the beginning of a dive trip. That DM must be thinking, "Uh oh! What a geriatric! This is someone I had better keep a close eye on!"
I further imagined would it would be like if the situation were reversed. What if you were a new and excited scuba student meeting an instructor who looked like that for the first time? How would he or she feel about it?
Charles and I are roughly the same age. Hopefully I look a little better, but it makes me think a bit.
In UK most decent dive boats has lift!!
Just do not compare yourself with him.