I don't understand how people think so little of Musk to mention Eberhard and Tarpenning as essential to Tesla, when practically all of the difficulties in nove

I don't understand how people think so little of Musk to mention Eberhard and Tarpenning as essential to Tesla, when practically all of the difficulties in novel car manufacturing involve the factories that actually build these cars. Tesla started work inside their first factory in Fremont in late 2010, years after Eberhard and Tarpenning were gone. There's 20 different EV companies that have flashy designs on paper. Almost none of them are manufacturing for profit.