I have have/had (no operation yet) a torn meniscus; doctor said he could but it seems to not need it.
I can go from not knowing it is there, to getting up out of a chair is not pleasant.
I ignored it for decades, till I could barely walk when I got out of a chair , he massaged, a lot of twisting and pushing which semi-fixed it in one visit, better than it had been in twenty years, does not bother me three years later, but if I get down on my knees , like I did land-scaping it lets me know it is there, quickly.