You are making a straw-man argument. Nobody here is claiming Amazon should be forced to sell a Book. The concern is whether it is a right thing for Amazon to do, not whether Amazon has the Right to do it.
> Should Amazon, or other intermediaries, be allowed such interferences?
It's not a strawman to read that, then ask:
> Shouldn't a merchant be able to decide for themselves which products they want to carry or not carry on their shelves (both physical and digital)?
> Is the alternative that a merchant should be forced to carry a product against their will?
edit: formatting