I forward exercised my stock options when I started a job for $7k in 2013. Last December I was able to sell some that valued my initial grant at $1.3m (still private but probably will raise at higher value or go public soon). Because I forward exercised I paid taxes at the 2013 value of the company, which was basically nothing. And I only pay long term capital gains when I sell, which is less than the earned income tax rate.
Of course there is a certain element of luck involved, but to say that the mathematical probability of building wealth from your share of equity in a startup is the same probability as winning the lottery is completely disingenuous.