Corporations are not humans and do not honor the social contract.
Hard disagree: telling me what I can and cannot share with third parties is YOU not being nice. Me sharing things with third parties does not involve you at all.
Copyright (in the US) is not a moral framework but a ulitarian one - intended as a way to incentivize production of creative and scientific works by intruducing entirely artificial scarcity. But that's just a handwavy justification for the invasion of our rights that is accepted without question not because there is data backing it up but because that's what people are used to. In reality the need for copyright is questionable at best as humans have been creating long before copyright was invented. It is also questionable that we need to keep creating new content at the current rate when we still have (or could have without copyright) the entirety of creations from human history at our disposal.