you should read Musk’s “Tesla Secret master plan “ then:

“”[...]the overarching purpose of Tesla Motors (and the reason I am funding the company) is to help expedite the move from a mine-and-burn hydrocarbon economy towards a solar electric economy, which I believe to be the primary, but not exclusive, sustainable solution.“”

https://www.tesla.com/blog/secret-tesla-motors-master-plan-j...

The point being that he has to make sexy / desirable car that other people would rather buy and drive rather than ICE carbon-based polluting cars.