Why should you examine your writing style with the idea of improving it?

I think as a writer you should always keep a open idea towards improving your writtings because everything is open to improvement, there is always a little change that you could take in as advice but in the end i think its up to the writter to write however they want to write there paper because its the way that they express there work. you cant tell someone how exsactly to write something and instead should just give them advice. as a writter you should always re-read your writtings and just see how it sounds as a paper then after re-read it and see what could be changed. its always best to keep your ideas open to improvement though