Agreed and don't forget licensing. OK so TSLA makes squeeky sunroofs, who cares, they can sell batteries and controllers and motors to ... construction crane companies or something. You know all the weird details of making a tow truck, cool, here's the parts to make it electric.
Happens all the time in the automotive industry. The first "american" hatchback car I ever drove had a nice VW engine. Ironically it was something to do with low emissions.