Man, I'm going to have to disagree there. All types of music are for entertainment, except the obvious exceptions such as religious music, etc.
Why do you go to a classical music concert? Why, to be entertained!
And why can't this person ask a question about Michael Jackson piano music on a piano board? It's a piano board.
Anyway, whether you like it or not, Off the Wall is a classic album that will stand the test of time (unlike the man himself, who is probably about to cave in from the nose downwards).