Typically, it's not "build a company, any company" vs. "follow their life-long vision". More common story is to build some successful project/company, then to

Typically, it's not "build a company, any company" vs. "follow their life-long vision". More common story is to build some successful project/company, then to build the real thing. Elon Musk started with Zip2, Tony Hsieh started with LinkExchange.