Earlier quoted context omitted.
There's a common saying "Nobody ever gets rich working for someone else". I am not sure how much that is backed up by any statistics but the Bay Area and employees of unicorns or Google/Apple/Amazon/Microsoft/... may be outliers to this adage. Anyway the point I am trying to make is that as an engineer you either have the choice of working for an employer and living an albeit comfortable life (without any risk) or go…
This adage is used mostly by snake oil salesmen slinging get-rich-quick schemes. Working for somebody else is probably the best way to get rich. Putting a qualification here, rich is not filthy rich, but affluent to comfortably rich.
I'm defining rich as making 7 figures a year. I think that's a pretty fair assessment. You'll never get that working for someone else (especially as an engineer), barring extenuating circumstances. High equity employee #1 or co-founder is the way to go.
High risk, high reward.