He wants to provide the best show for his fans. You guys totally overplayed the whole thing. If you watch the entire clips of the concert/song, you can see that he wasn't behaving in the manner which y'all portrayed. Shame on you!
It's wasteful and foolish to destroy a valuable instrument. Baby had a tantrum because things didn't go his way. Pianos bring God's joy into people's hearts. They are God's voice. I bet everyone around him thought even less of him than they already did after the couch incident. How stupid.