And who elected Amazon to be my parent, to decide what I can and can't read?
Frankly you did.
If you choose the convenience of buying through an Amazon account, instead of signing up on X number of direct retailer sites then you chose to accept their decisions on what they will (and will not) sell. Not "publish". Sell. Just as you chose to let them track your buying decisions (and quite a lot more beside)
Can you even name an actual competitor to Amazon?
Who did this? Look in the mirror. Own it.