It's not that they like to be annoyed to hell with stupid complaints of reposts, etc. It's that they're annoyed to hell with fvcking dumbasses that can't post in the correct forum or use the fvcking search function. Well, now that the search function is absolutely FUBAR, reposts don't really get to me. I keep forgetting it's broken until I go to use it and realize that I'd rather NOT post something at all than go through the trouble to figure out how the fvcking hell to search, then not find what I want, then post it, and get "repost!" from those who've already seen the thread.
However, the reason the other forums exist is to funnel traffic of specific nature to them, dividing the subjects into organized catagories. This accomplishes several things such as, but not limited to, people being able to more quickly answer your question because they can actually see your thread without it getting buried by the loads of other threads that are totally unrelated in one giant forum. If you have separated catagories, the people who are interested in, say, networking can go into networking and see nothing but networking threads where they can contribute questions, answers, and various other networking talk. If we had just one huge single forum, everybody's threads would be buried to page 2 before the forum even reloaded after they initially posted a new thread. Post in the correct thread where the subject matter that you're posting about is concentrated and you'll get better responses and get them faster. The reason those forums don't move as fast is that so few people actually post the on-topic material in the threads where they belong!
Think about it this way. You have a 60,000 sq.ft. warehouse of computer parts. You have a section of that warehous dedicated videocards only, another one for CPUs only, another one for mobo's only, another one for HDDs only, etc. If someone runs a new videocard that's just been inventoried and now needs to be put on the shelf, do you throw it in with the HDDs hoping a customer who's looking for videocards will look through the HDD section to find it?
Obviously not.
If you want to get a question answered quickly, respect the fact that these forums have been split up for a reason, and post in the correct forum. This thread belongs in Forum Issues, by the way.