When I said "guides", I presumed the context would make it clear what I meant, but I guess it didn't, and that's my mistake. In this context, a "guide" is when someone posts a question and immediate self-answer for the sake of sharing known information with a larger audience, thinking it might be helpful to them. This is a noble cause, but something that's a little bit weird on our site. It's technically allowed, but it's also frowned upon to do it for information that is either fairly simply to look up or to find with a bit of quick poking around.
I'm not even sure what you think the common thread is between the example questions you've shown here. They all simply have answers to questions, but that's what our whole site is, questions and answers. What our site isn't is articles about how to do things better. For the most part, if you have a question about how something works in a game, please do ask it. But if you have an answer about how to do something, then that's just your latent expertise, which you may use in answering other questions as they come up.
Is asking and self-answering allowed? Yes, in some cases. My gut feeling was that the question you asked today wasn't one of those cases. Hopefully someone else will come along and provide an argument as to why that may or may not have been correct, but I don't have time to ponder the intricacies of that specific policy at this specific time.