'As long as you play by the rules, behave ethically, and are honest, I see no problem with becoming as rich as (you can | you want).'
The rules are questionable at best and we've seen many startups (including some that are funded by YC) act in a manner that some would not consider ethical (I'm reminded of InstallMonetizer https://news.ycombinator.com/item?id=5092711 -- I think a made a few comments there). That suggests people are it in just for the money, which makes the situation worse for the rest of us who are doing startups for something more.
The rules are questionable at best and we've seen many startups (including some that are funded by YC) act in a manner that some would not consider ethical (I'm reminded of InstallMonetizer https://news.ycombinator.com/item?id=5092711 -- I think a made a few comments there). That suggests people are it in just for the money, which makes the situation worse for the rest of us who are doing startups for something more.