I wasn't saying you should avoid all activities that carry a risk of injury. My point was simply that most people who are overweight tend to be grossly under-prepared for the kind of stress running puts on their bodies. There are other lower-impact activities that will achieve the same results without wearing down the body. And I agree that everything has to be done with the right form, and sometimes this means throwing your ego aside.
If running is what gets you up and moving, then make sure you're prepared to do it right, and then do it.