O-10, we've been down this road way too often and I don't know how or why you got on the subject of practicing; it has little to do with the subject of objectivity and would be applicable to musicians in any genre, not just jazz. With all due respect you are simply mistaken in making connections that don't exist, and it demonstrates why some of these discussions become so strained. I won't beat a dead horse and can only suggest that you not be so quick to pull those hairs out. But, since you brought up the subject of practicing:
"If I don’t practice for a day, I know it. If I don’t practice for two days, the critics know it. And if I don’t practice for three days, the public knows it." - Louis Armstrong
"If I don’t practice for a day, I know it. If I don’t practice for two days, the critics know it. And if I don’t practice for three days, the public knows it." - Louis Armstrong