If not for Tesla, America (& the Western world in general) might not be on a path towards private inefficient electrified road transport, leaving much more room for investment in & upselling of vastly more sustainable non-road transport, as has been done in China.
Musk in particular has form here - consistently blocking & derailing all potential high-speed rail projects for the west coast in favour of white elephants (the material result being a maintained reliance on roads, and - by extension - his big cobalt-mine-dependent business).