I don't know what society you live in. But my society has Wal-Mart in it.
You think those Wal-Mart folks would hesitate to drop your product from their shelves without giving you a reason? You think they are shy about making their suppliers sign a scary one-sided contract and then holding them to it?
And the App Store is not made from Soylent Green. In the grand list of potentially unfair business practices I doubt this even rates. Compared to what the music industry does to bands every single day, this contract is sunshine and birdsong.
Alas, if you don't like Apple's contract terms you're stuck doing business with their competitors. Fortunately, they're easy to find. One of them is probably clinging to your leg right now.