...but I thought most entrepreneurs wanted to "change the world" with "revolutionary" businesses?
I think coops are more suitable for that "change the world" while being "revolutionary" story. In fact many anarchists (and market socialists, and mutualists) envision a big coop sector to democratize work life. I think it's pretty revolutionary in that way. Noam Chomsky and Murray Bookchin promote these ideas.
I don't think there's anything wrong with caring about money, in fact I think it's a mistake not to care about money in a system that revolves around money. However, listening to people tell me how "passionate they are about 'X'" when in reality they are only passionate about making money is one my biggest pet peeves.