Huh? pretty much every one of the recently successful AI startup employees (OpenAI, Anthropic, etc.) have had stints at Google Brain.
I think the person you're replying to is wondering why the other 25 million of us aren't doing the same.
From a financial perspective it is much more probable to become a millionaire through a FAANG than a startup right now.
Crush it at FAANG for a few years and don’t spend like crazy and you’ll be a multimillionaire.
Starting from $0, this requires saving $125k a year for 21 years to reach $10.06M at an 11.88% interest rate, which is the S&P500 average. Well within the capability of any senior SWE @ FAANG, and it only takes 4 years to get to senior.
But then capital gains taxes hit.
Anyways, yes, a startup employee on the other hand can become a deca-millionaire in a year or two.