With carrier-subsidized phones, you sign a contract at the time of purchase agreeing to those rules, and if you don't like them, you can pay full price for an u

With carrier-subsidized phones, you sign a contract at the time of purchase agreeing to those rules, and if you don't like them, you can pay full price for an unlocked phone instead. With game consoles, you don't sign any such contract, and the manufacturer won't sell you an unsubsidized unlocked one.