Again, I try to look at Dion in an objective manner. Not one that is from a die hard Cavs fan that hopes Dion reaches the absolute top of his potential.
To answer your "because?" as succinctly as possible I would say this, and please read the entire post before the flaming begins. Dion Waiters is not very good (right now). He has a 12.3 PER, he is an extremely poor finisher at the basket, he is a below average outside shooter, he is a borderline chucker, his fiery attitude is his worst weapon as it often manifests itself in a way that is not conducive to winning basketball, he is undersized for his position, and he is incredibly streaky.
What I do see is a group of RFC posters that is obsessed with this young man, and what you do see from Dion is bursts where he shows insane high potential surrounded by large periods where he is everything I stated above. What most RFC posters fixate on are the plays like the dunk at the end of the game tonight, rather than the performance as a whole.
Like I said I watch every game 2-3 times, I like to study the game. If this current itteration of Dion is a sub par NBA player, there is no other way to put it. Now, can that change? Absolutely! I expect he will work on all facets of his game.