Not necessarily. Valuable to the TEAM. Like if I have all 10k guys, and one 100k guy, obviously the 100k guy is the most valuable guy. Let's say another team has 5 100k guys. There is no MOST VALUABLE in this case. Also, leading in points and rebs and assists doesn't necessarily mean good. Invisible things like defense also play an equally major role.
"Falling in love is not at all the most stupid thing that people do but gravitation cannot be held responsible for it."