I would imagine that Musk cares less because Telsa is already unable to meet demand, so bleeding off demand for a quarter or so will have less of an impact on its bottomline.
Additionally, the wealthy people who buy Teslas are more likely statistically speaking to be Trump supporters, or have a more nuanced view on politics because of their socioeconomic status.
We can't all distance ourselves from our long-time friends due to a single election vote.