Theft is when I walk out of a store with 8 apples and the store has 8 fewer apples.

Piracy is when I walk out of a store with 8 apples and the store has 0 fewer apples.

They are mathematically different concepts.

Theft clearly seems to be seen as acceptable when it comes to corporations taking away access to purchased content. I don't see why that shouldn't work both ways.

In that case, copyright is a socially acceptable form of tyranny that prevents freedom of expression. Or a socially acceptable theft from the commons.

Dystopian ideas such as ownership of ideas should not be tolerated.

Gee, what a solid and water tight argument. You sure have me convinced now.

Piracy and theft are two different things.

Piracy is not theft.