I don't think i am quite considered a boomer being 43 tomorrow. But I kinda agree with the injuries, in while we were young to progress the arthritis. While both my knee have arthritis, I have to say the left one is a bit worse, always has been since i was 12 , was playing softball, and turned a certain way while running for the ball, and my left knee patella completely dislocated, it was just sticking out there for 3 hrs. When I finally got to er, they reset it (OUCH!!!). I took 6 months of pt and healing before I was off crutches and could walk. They said all the ligaments and tendons and such were all messed up, that's why it took so long to heal.
So in conclusion I beleives thats why my left knee hurts more then the right knee, more damage done to it over the years.