They point to documentation in response to the kind of request I've seen closed with RTFMs elsewhere. They'll expect one to read it, and try one's hand at whatever one is trying to accomplish — and they'll feel slighted by a refusal, given how much work they put into it.
And yet, they go to great, unexpected (given the fame) lengths to help someone actually making the effort; they don't try to put anyone down in order to feel bigger than they are, but they don't sugar coat things to appear more likable either.
In short, no, knowing what one is doing isn't a prerequisite; it's more about not foisting onto others the responsibility for the effort required to move from where one is to where one wants to be — whether in knowledge, maturity or tools.