I would love to know how a lawyer will know if you unplugged your speaker or if you purchased it prior to them being included. That would be a hell of a lawyer and worth every cent!!!
It's silly. Any car's road noise (tire/road friction) is much louder than the artificial sound at any speed likely to dangerous. The car has 8 cameras, 12 ultrasonic sensors and 1 radar sensor, can distinguish between an SUV and a traffic cone, can read stop signs and traffic lights, and auto-brakes. No one will be saved by this annoyance. And if some lawyer finds my wire disconnected, I'll just tell him "It's a Tesla - a lot of the stuff doesn't work. Get used to it!"