why don't people think about the things in OP that he doesn't know first?
Probably because it's impossible to know what someone else does or does not know.
What I meant to say was "Why don't people first think about the things in the OP that himself doesn't know about?"
Yes one may not know whether others know the things you are going to talk about, but one can certainly at least try to notice something that himself does not know about, especially if it is written in the open post. And the dismissiveness really just comes from this "refusal to read and think about something yourself do not really know."
That being said, I quite like this sentiment. A really serious issue I encounter when I write papers.
@dondon: I am sorry if I misread or misunderstand, but I somehow saw you said somewhere that you usually get one gold then ventures. That's where my comment is from.
I do quite understand your sentiment and generally agree - BUT, I, for instance, hadn't actually thought of Venture in quite the way dondon posted. (Indeed, what I would have described as the straightforward thing that venture does is give $1 and draw a treasure; adding $1 to the value of a treasure is perhaps a subtle difference, but I think it's quite an interesting one). Or when someone first said it was a peddler variant - this is just as much 'printed on the card', but I really hadn't thought of it that way at all until someone said it. So the larger point is that what seems obvious to one person doesn't necessarily seem obvious to another. And generally, I think it is better to give more things, even if they seem obvious, than less, if we have to risk erring on one side or the other. Of course, this is merely my opinion.
Anyhow, there's also nothing wrong with suggesting that someone is over-thinking a problem, either.