Bicep tendon severing surgery

I injured my biceps tendon through years of training wear and tear. Dr. says I have tendonOSIS .
It will not heal.
Two years ago I had shoulder surgery where they fixed a torn labrum and hoped that would cure the problem.
Two years later I still have pain that prevents exercise and sometimes makes something as simple as writing or combing my hair uncomfortable and inflammatory.
I am 45.
I am working with one of the best shoulder Dr.s in the country He says severing one of the two bicep tendons is the next step.
They do not reattach it. Years ago they apparently did reattach but there are less complications, recovery and similar functionality if they don’t.
He says it is a very common operation. Even John Elway had it.
I should be fully functional afterwards with minimal recovery.
I don’t really care about appearance ( apparently the bicep then kind of drops then eventually withers away).
I just want to take a shot at being improved functionally (mow the lawn, play ball with the kids etc.without the worry of pain the day after).
Sounds like this has a good chance of solving my problem.
Still, once that tendon is severed, there is no turning back.
Its a little scary. Do you know of anyone who has had this bicep surgery and what they are like later? Have you had any experience with this? Thanks for your help