Isn't that just pure gouging? If a Tesla is harder to repair it'll take longer and be more expensive for that reason, no increased hourly rate necessary.
When Ford started making putting aluminum bodies on their F150s, they had special training programs for doing bodywork and repair on them. I guarantee that cost was passed down to you.
It may not even take longer to do the repairs, it might take the same amount of time once you learn how to work on them. That said, I guarantee the shops and insurance companies are recuperating the costs of that extra training.