The knee comparison is a good one. Know that in the 70s/80s surgeons still believed that the meniscus was a relic of evolution and that did not play any role -> after an injury they often suggested full removal: it is not needed (they said) and you will be perfectly fine without it (they argued).
It is with this historical view that you should look at and listen to any surgeon these days: they might look equally naive in 40 years time…
Knee and back problems are often tackled these days with PT: what I mean by this is that PT is indispensable even after a surgery.
I personally think that after every injury you never are the same person no matter what: you may be “worse” in certain aspects but might have learnt and improved your body mechanics in the process of tackling the injury, which might make you better in other ways….(I don’t know about professional athletes, but I have seen this in martial arts, me included)
As for the pain, I guess it is difficult to understand where it is coming from (sometimes not even from the hernia itself apparently) and so there is a higher chance that the surgery might not resolve this issue, which might mean a (long) time is needed? (again I am no doctor) Time is actually the outrageous thing in all this: it takes a long time to get better after a surgery, and those who say you are up lifting a car (just kidding here:) two days after surgery should have their license stripped (this bit I learnt very much early)