[cthalupa]

A wide variety of joint issues are improved by performing a slow and steady progressive overload with lifting weights. Not all of them, of course, and yes there are some issues that preclude lifting, but this seems rather pedantic. There are a trillion things that most humans can do with no detrimental impact that a small subset can't. Trying to couch every suggestion based on edge cases is silly.

The overwhelming majority of people would benefit from doing resistance training 3x a week, cardio 3x a week, and shifting their diet towards more protein and less carbs and fat. People who fall outside of the large majority due to specific medical conditions need to understand their medical conditions and how they impact their daily life, because expecting everyone else to always take into account these issues is unreasonable and unproductive.