This sounds rather hyperbolic. Sure, if you want to do business with customers through Apple's platform then you need to abide by their terms, but you can do business with them.
On the surface it feels a bit like complaining that you can't do business with customers through Stripe, because Stripe has Ts&Cs that you need to abide by. Apple's situation is more complex, but I think the underlying reasoning on this specific point is the same isn't it?