Look at the breakdown. Car insurance is four main components:
(1) Personal injury -- for people in the car getting injured. This is LOWER for Teslas than for other cars.
(2) Liability -- for you injuring people in OTHER cars, or pedestrians, or damaging OTHER cars, or crashing into other people's houses. This is LOWER for Teslas than for other cars.
(3) Collision -- insurance for repairing YOUR car if it gets hit by another car. This is HIGHER for Teslas than for other cars, because the parts are expensive and the body repairs are expensive.
(4) Comprehensive -- insurance for repair YOUR car if it gets damaged by something else (like a tree falling on it). This is HIGHER for Teslas than for other cars.
Now you know. The insurance industry agrees that Teslas are safer than other cars, but they are expensive to repair.
That said, definitely shop around. I've seen really wild variation in premiums for insurance for Teslas, much higher variation than I am used to seeing with other cars.