Tom Bro'
'RSI' is a real-pain, of that, there is no doubt
However, I would [personally] weigh the surgeon's option
against the 'paid-work' he is promoting
_given the knowledge freely available
Your long term experience with that problem
provides you with a great deal of [very personal] 'hands-on' experience_ pun not-intended
Anything done repeatedly and for long periods can wear down body parts
and PC operators are-advised to stand up and move around [do, other-things]
after, two hours at the keyboard
Doing other things [instead / as well] can help avoid those symtoms
Surgery, has it's risks [of failure] too
Your hope of relief "from pain and numbness for good"
may not come from surgery ~it could come back, afterwards
I guess, what I am saying, really comes down to;
alternative exercise of those areas, then being 'a more natural' solution
I will keep your wrists/hands in prayer, for the best of outcomes
whatever solution you aim for
your Bro'
dave