Having just suffered what could arguably be about as close to a life changing injury without appearing to have any serious long term effects (although it is still early days) I feel I am maybe in a position to comment on this thread.
For me, my incident has not dented my confidence or desire to cycle one bit. In fact, I am hoping I can manage to cycle to work the first time I go back during my recovery.
My position does not match yours though, and over the years you have mentioned several serious medical conditions and injuries that alone would be a reason to consider your safety on a bicycle and added together has got to represent a big argument for you not to ride a bike.
I don't know you well enough to be the judge of this but are you not now at the point of being like the stubborn pensioner who has kept driving for years after they should sensibly have packed it all in? A cyclist does not represent the same danger to others as an unsafe motorist but you also have a responsibility to think about yourself. In fact, given the terrible state of affairs in hospital A&E at the moment it would be downright immoral to continue riding knowing that there is a high possibility you will become a further burden on the services already stretched to the limit -
www.itv.com/news/anglia/2018-03-09/patient-dies-due-to-dangerous-overcrowding-in-northampton-a-e/
Accy, you probably know your condition much better than anyone else but, from memory, you have multiple conditions due to previous injuries and medical conditions and age that seriously affect your mobility, vision and reactions as well as making you prone to more serious consequences. It might be time to put the bike away and that is nothing to be ashamed of if it is the right decision.