(Not a lawyer) Everything AI made is stolen, therefore contracts, and so copyright, are void. Right?

Contracts that are at all unlawful are unenforceable and therefore void. But what about copyright?

If, in the middle of the night, you break into a McDonald's and then call it McFelfs, and in the same night, steal everything out of a Starbucks and sell food and coffee with scratched out logos out of your McFelfs, does it become legally yours?