I think a lot of it is there's the same questions over and over and people get tired of typing the same answers each day. You mentioned a post about helping hatching eggs. They're are literally hundreds of pages on here about that topic if you search for it, and no one answer. Seems about 60% say to help them, while 40% wouldn't help them for anything. Just earlier tonight in the recent posts feature there were 3, count em 3!, posts about how to get chicks to go into the coop at night. I think some people don't want to look for info, they want an instant answer. I'm guilty of it at times as well. But if my post gets no answers, then I start searching, and almost always find my answer. But, if you go into the chick section, and the 5th post down is "why won't my chicks go in at night?" and it has 7 replies, and then you dont bother looking at that and post "my chicks wont go into their coop at dark", well, thats why you dont get any answers.
Also, a great starting place is the forum FAQs listed at the top right of every page. LOT of info there.
So, if you want to get mad and not post, that's your choice. Or you could look up the easy questions, post harder ones, and help answer those you know the answers to.