The point is that the main problem can't be solved at the two-guys-in-a-garage level.
Two guys in a garage can create a wiki. Two guys in a garage with a million dollar PR budget can create a wiki and get it widely publicised. Two guys in a garage with a fifty million dollar budget can hire a bunch of writers to get the content kickstarted. But ultimately, the problem of persuading thousands of people to contribute to a brand new service is not a problem that anyone knows how to solve -- it either takes off or it doesn't.
The two guys have an advantage - lots of former editors are sick of Wikipedia, and non-deletionists have nowhere to go. I don't see any reason why two guys in a garage couldn't succeed.
Well. It's a problem requiring a creative solution. It's certainly hard. I don't know how to do it, but I wouldn't say it's impossible or all up to fate.
It's difficult to persuade hundreds of thousands of people outside said garage to write the actual content.