Counterpoints:

1) My auto insurance is already too expensive. I have zero interest in "oh yeah we had to add to your driver factor because telematics says you exceeded the speed limit 11 times last year :^)". Less tracking is just a bonus.

2) He made no irreversible changes to the vehicle. Just keep the part and plug it back in when you need it for service/inspection or whatever.

3) "Telematics disabled" probably adds to the resale value of the car.