You certainly asserted such by arguing piracy is morally.
No I didn't. You are either ignoring or misunderstanding what I'm saying. My claim is that certain arguments don't justify why piracy is permissible. Not that piracy is morally wrong.
If IP belonged to the public ...
I'm not making any claims about who IP belongs to.
So please, by what authority are you asserting puts IP in the hands of private interests, thus making piracy a moral wrongdoing.
I can't give you any authority on this because if you reread what I actually said, I'm not claiming piracy is morally wrong and I'm not claiming anything about IP ownership.