George:

You asked: Why do people need to ask questions at all?
Who are the “people” you’re talking about? I observed technology enthusiasts (I’m one of them ;)) make a lot of assumptions about “everyone else” and their motivations and interest in technology.

You asked: Why not just experiment?
Perhaps because some people have neither the time nor the inclination to. I’m also not sure why I should assume experimentation is inherently a good thing.
34 yr old woman says: I have 2 jobs, and 3 kids to tend to, what’s the value proposition?

You said: I didn’t ask any questions when I started with Twitter/Blogging/whatever.
I started using them and still asked questions, and still do. Isn’t that what experimentation is about?