As SaintWacko points out in a comment, StackOverflow is for programming. Therefore, it has led me to believe that the reason why it's different on this site is because programming is largely based on logical objectivity.
Arqade does not have those restrictions. If you need an example for that, you can clearly see in this very question that most users jump to conclusions in many comments and answers. They do this by referencing something I never mentioned in my question -- my actual FPS post that was deleted.
What I asked was a hypothetical for which the actual text had the same text in common with my deleted post. This is not the same thing! Just about every user decided I was referencing my post instead of posing the actual question that I asked. I didn't post a link to it, say "my post", or make any indication that my question was not a standalone question.
And this was after I even showed how most users on the longest running SE site to date (the original stackoverflow) mostly agree with my point that nearly all questions are useful to someone. It doesn't have to be useful to me the asker or even the answerer or even if I'm both. Well here it has to be relevant to video games and there to programming. I'm sure there are other reasons for useful questions like avoiding duplicates but it's a short list.
"[I]f a poster asks "What does FPS stand for" and this question is not in the knowledge base, then why would it be deleted? So is there something that makes gaming different?"
If I had said, "hey I posted something and it was deleted so what's the problem", then I would understand some of these responses. That's not what I said and yet that's what I got anyways. I bet a lot of people complain this way so I partially understand your assumptions that I was doing the same. But really, I expect the community to RTFQ.
If I humored you by talking about my actual post after the answerer/commenter brought it up, it was only because I was also interested in that in terms of discussion, which I believe is one of the uses of the comments. In the future I will probably just ignore you and emphasize the answering of my question, so sorry if I egged you on.
This community by large was not able to tell the difference, which is why my answer is that the communities are different because the Arqade community is not held to the same high standards of logic that stackoverflow is.