Could you persuade him to join some clubs eg Probus, U3A, where he could get involved as one of the organisers? They also have trips away with interest groups.
It sounds as if he has a lot of surplus energy which needs channelling into a positive direction.
DH was like a spare part when he first retired then I suggested he joined local groups, which he did with enthusiasm.
I'm not keen on going on holiday since Covid. Yet more friends have returned from a cruise with Covid. ☹
If your DH's cataract operation goes ahead in January he should be ok to drive by the end of February but if you don't want to go put your foot down.
Holidays are great but they're rather like taking vitamins when what we need is a good diet every day!