You're so self-righteous

No need for insults.

what compels the carpenter to make it to your specifications? Even if you paid him? Nothing.

Violating a contract has penalties. Yes he can ignore it and then give your money back with the potential of being required to give extra money back because of the contract violation.

The trouble is, you insist on framing this in terms of the carpenter's rights.

It wasn't my analogy. I'm working with what you gave me.

disputing his rights.

Demanding he work for free is disputing his rights.