To put it another way, you wouldn't put a 200 pound weight on an old, rickety table and expect it to hold up very long. The table would lean, develop stress fractures, and eventually crack. The same thing could happen to your body without the proper joint mechanics and stabilization. While risk of injury is the most important concern, you are also likely to plateau in the amount of resistance you can withstand. Stabilization allows you to support more load and delay muscle fatigue which results in more efficient and effective exercise. We need to work from the inside out, not the other way around.