To cultivate a welcoming site for first-time visitors, it makes sense to answer easy and basic questions. In order to graduate, we need a corpus of repeat users, so if answering a new user's simple question helps more new users become interested in SE in the first place (instead of feeling like the site is only for experts and get deterred from getting involved), that's a good thing.
Repeat and long-term users wouldn't normally ask such easy questions here, so once a newbie gets used to the SE format and the Anime and Manga SE's specific guidelines, they likely will naturally become less interested in asking basic questions that they could find at the top of the first page of Google search results in 10 seconds. I don't think answering such questions would generally lead to more of them being asked by the same person. If each new user asked a couple of such questions but then a fair percentage of those users felt encouraged to get more involved and start asking more interesting questions, and a percentage of those folks became long-term staples of the community, it would benefit the site.
When I answer a question that seems silly, or extremely beginner-level, or simple, I do my best to make my answer educational by expanding on the question (if we simply closed such a question for being remedial, incorrect assumptions and unfounded rumors would spread further... and then more people in the future might ask the same question). If we flesh out the answer beyond a single sentence or yes/no, the OP gets the question answered, but anyone else who looks at it afterward might also learn something useful from it. For the question "Who is the creator of Yu Yu Hakusho?," Torisuda did not only provide Togashi's name but filled out the answer with some general info: he also is well-known for HUNTER x HUNTER, how he came up with Yuu Yuu Hakusho, and that he is married to another very famous mangaka. That is value added content that makes reading the answer contribute to the informative aspect of the site and could pique a rookie's interest in exploring more and thereby becoming more knowledgeable over time ("Oh, he wrote HUNTER x HUNTER too? I've heard of that, maybe I should check it out").
StackOverflow has a somewhat different situation: it is a Q&A site open to anyone but it aims to be extremely useful to professionals working in the field. The Anime and Manga SE is not primarily comprised of nor targeting as its user base 1) professional mangaka, animation directors, and animators in Japan, 2) translators and professionals in the licensing business, or 3) manga and anime scholars conducting academic research in universities inside and outside of Japan, so it is not primarily aiming to answer the sort of specialized questions that those demographics would be more likely to ask (such users and such questions would certainly be welcome and on-topic here, but they would likely ask/answer niche or hard-to-find information that the pros can't even easily get ahold of in Japanese publications and news sources). At this point, this SE is primarily aiming to be a resource for non-industry anime and manga enthusiasts, and thereby belittling people or looking down on them for being green is counter-intuitive. A goal is to foster a fan culture of better-informed viewers and readers.