Nah, I have really fucked up joints (fibula dislocates just getting in the car about once a week - also knees and elbows can be a problem). I can see it maybe being a problem if you don't know how to take care of yourself, but there are ways around it. Sucks for me because I can't lift as much as I used to, but I'm getting a little stronger each day. You are correct that it's usually caused by being a fatty, and those I know with joint pain that are older usually have the problem because they're obese. They know if they lost weight, there would be fewer problems, which annoys me because even though I'm a healthy weight, I have to be extra careful or I'll need surgery again.