But it is patently absurd for them to be higher than all other car companies combined. By any possible measure, they are far far smaller, and have far smaller prospects for growth, than the rest of the card industry put together.
The only place where Tesla has a lead is in sales of BEVs, where indeed they are selling more than the rest of the industry combined, except for some Chinese companies. However, BEVs are still a tiny part of the car market, and are likely to remain so for the next ten years at least.