Not necessarily. Tesla was originally founded by Martin Eberhard and Marc Tarpenning in 2003 before Musk joined as chairman and major shareholder in 2004. Musk became CEO out of necessity since he was already CEO of SpaceX.

Being like Musk is not the norm. In fact, he has publicly admitted in an interview he did with Bill Gates about China, that combining two CEO roles makes for a terrible work-life balance -- he wouldn't wish it on anyone.

https://en.wikipedia.org/wiki/Tesla,_Inc.#Roadster_and_priva...