Wrong, AGAIN.
Power comes from speed, speed comes from technique, how much weight you can pick up off the floor has nothing to do with it.
If you have strengthened your legs to squat hundreds of pounds, then you have developed your leg strength... to lift hundreds of pounds. In no way shape or form is doing a squat anything like transferring your body weight from the ball of your foot to the end of your fist.
If you lift weights, and gain 5lbs, then you will increase your power, because you are using your technique to transfer 5 more pounds of weight from your foot to your fist.
However, if you have 2 fighters, same weight, one squats 300lbs, one squats 200lbs, both using the exact same body mechanics to transfer their weight from foot to fist, explain to me how the fighter who can squat 300 is going to have more power? They both weigh the same, both of their bodies are going through the same process to move that weight into their punch.