Why?
Well, let's face it, the most revolutionary things have all started sounding silly and insane. People will buy things over computers without having actually seen or touched them? Humans will fly? Will travel to the moon? Everything is actually well modelled by equations that imply that everything is a wave and has probability it exists?
So just because YOU think it sounds crazy or insane, doesn't mean it doesn't have a chance at something big.
After all, who would want to communicate in 140 characters only, or have a real time feed of everything their friends do, or want tiny square pictures on their phone?
On the subject matter, I've lived in SF for a few years now and I was born in Canada. In the US people will give you a chance, in Canada companies want to know what you have done and get you to do more of it.