You Can't Handle It

Chances are - you could not handle getting everything you wanted.
NASCAR uses a restrictor plate to reduce speeds at it's races and to lower the chances of deadly crashes.
Addictions, fame, wealth, an overabundance of food, big houses, pimped-out cars, bling, and status would kill you.
If you cannot handle what you already have without being jealous, spiteful or arrogant - why would you expect to be given more of what you ask? 
If you are unteachable with a little - you would not heed wisdom with a lot.
"Want" is the restrictor plate used by nature.

The worst case scenario would be that wherein one has more 'fans' than friends - when no one can tell you nothin'.
The best case scenario is that wherein one might end up sans-teeth for breaking the social codes of any given group.
This is where one finds true happiness.
(Notice; The Fishbone cameo in the Pepper's video?)

Replace the man of which Mary J. Blige sings with anything - piety, wealth, fame, status, anything...
Her conclusion is that she has to matter to herself - that her happiness begins with herself and not in some outside source.