You didn't pay for it.
Tesla includes it at loss because it's cheaper than making you a special version without it, and it opens up new sales by reducing the price (e.g the originally locked batteries let them sell a substantially cheaper car than they could have otherwise)
Subscriptions for that should be banned, but including heated seats and making you pay once to access them is fair game.
Manufacturers dont owe you anything for free.
Edit: also, short of something like FSD which depends on future work from Tesla, I don't think they have a right to prevent you from bypassing a lock and accessing those heated seats if you can