also if your bending at the hips your giving your opponent a reach advantage if he aims for your head everytime you do it, aswell as setting yourself up for being fed an uppercut on your way down, also the proper bio mechanics of hooks are lost when doing this which means your fighting against your bodys joints to throw the hooks while bent at the hips which will tire you much faster while producing a much slower and weaker shot so you can say goodbye to effective punching or counter punching while weaving this way, and most importantly if done too much you cant fully see what your opponent is doing

P.S also it puts you off balance which generally makes the whole thing slow and clumbsy, the ladys not for weaving using the hips