Why do we love?

Here is what i don't get,why is everyone hating on Simon Cowell when he gives bad remarks during an American idol show,isn't that bad remark suppose to let the contestant know on what they can do to be a better singer,i mean if u hav good remarks all the time u will start feeling over-confident on ur abilities and u will start falling as a singer because of ur over-confidence,so bad remarks are there to help you improve on ur singing.Same thing can be applied to my SYF drama rehearsels.Every rehearsels should at least hav a bad remark so that the play as a whole could improve,if we keep on getting good remarks,we will start feeling over-confident and in the end,we will lose out in the gold award and honours.In my opinion,we must face criticism in our everyday live bcos they are here to improve on our skills

(p.s i am not on Simon cowell side,i am just stating my opinion on the fans response to Simon Cowell comments,so don't get the wrong idea)