The trouble with fishing, it requires all of our faculties, eyesight, concentration, coordination, balance, awareness, peripheral vision and more and all to some degree or other depending on what and how your fishing. All these deteriorate with age or health or both. For some this will be more than others. I spent an hour just sea watching from a bench yesterday with some binoculars, a camera and a book, I could easily have spent two or three hours in the sunshine, it was quite enjoyable if a little boring, watched a couple of blokes beach fishing in the distance flogging the sea with lures catching nothing and it is hard work. That is a particular type of fishing I know but it is all hard work to some degree.
I am not ready to give it up but some days, like yesterday and the day before, increasingly I am choosing to do something that is easier for me. I think that will be the case more than actually deciding to give it up, I will just find I will go less and less until I go no more and other interests/hobbies will just take over.