Earlier quoted context omitted.
And what happens in case it does not work out well ?
If startup goes to zero, then everyone goes home with nothing. The founders typically don't lose any money of their own -- that cost is shouldered by angel and series-A investors. Often though, the startup has a "soft landing" where it's acquihired by a larger company, and then the founders typically get executive or very senior roles (with large bonuses, etc) meanwhile the non-founders get standard employee packages…
The other thing no one talks about is founders tend not to dilute themselves, but often early employees are diluted heavily.