Routine maintenance on EVs does tend to be less, but non-routine damage tends to be much more expensive. That leads to insurance being 40% higher than comparably priced ICE cars. Essentially the median cost is a little lower but the mean cost is much higher.

Here's a interesting Tesla specific take: https://www.nerdwallet.com/article/insurance/tesla-insurance

Personally I prefer predictable slightly high costs vs random potential for exorbitantly high costs.