Its not an excuse. It is a fact. People have told you and others repeatedly yet you seem to think a man contracted to make 50mil doesn't have a target weight. Really, its very naive to think that Grant wasn't told at what weight to play.
Just think logically for a second. Meachem and Thomas came into camp overweight and out of shape. Peyton reamed them publicly for it and made no bones about his thoughts regarding their weight. Not one single solitary remark was made regarding Smith or Grant's weight.
Ask yourself why and then realize Grant reads this board and has a publicist that is telling him how he should handle himself. He's packaged and coached to man up and accept blame whether his or not. It makes him look good to say those things and looks are important.