Earlier quoted context omitted.
The two aren't mutually exclusive, you could've easily started out with salary + stock options that would've put you in a better position to start a side gig. Then you might actually be driving a lambo now too ;)
By '06 Google was already public so you weren't going to make life changing, never work again in your life money from stock awards/options. At best you'd be sitting on a decent nest egg that maybe bought you some property or better investments if you were smart (and a $250k supercar is not a smart investment).
With that money you could've funded any side project that generates recurring revenue.
I don't get why you should quit your job, take on tremendous amount of risk for a highly improbable outcome with heavy survivorship bias.