[MattPalmer1086]

How is it a transfer from the public to the private if I privately create something and want to privately sell it?

Copyright allows me to monetise my private creation. If it did not exist, my first customer could distribute it to everyone else without penalty and I would make no money.

That is why it is an incentive, not a subsidy. Without it, I will not invest the effort to create it. No public property is used to subsidize my creation.

In the absence of something like copyright, subsidy would be required in order for much creative activity to occur. You have it backwards!