A question like the multiverse one --- definitely NOT a candidate for instant closure. This is actually an interesting worldbuilding question. The OP doesn't ask for hard science or even science based responses. The query has too much personal fluff (doesn't really matter how much or how little you know about multiverses --- the only things that matter are your vision of the otherworld in question and how creative you are with the topic at hand). But the basic query is sound and fairly standard SF fodder. It needs work, to be sure!
I've noticed of late a veritable slew of queries being slammed shut after only a few minutes on the board. It's my opinion, and I know others disagree, but I find this practice at best troubling and at worst counterproductive. Worldbuilding is not only for the realists, the scientists and the engineers. There has to be room for the fantasists, the creatives and the irrealists, too!
I agree with JBH on this: we are imaginative. I've also said before that SE is NOT designed with an imaginative endeavour like ours in mind. It's totally unsuitable. But we're here, and so long as Stack Exchange (the company) doesn't shut this forum down, it's up to us to sort out how to fly our imaginative airship through what is basically inimicable territory. If we keep shutting down the creative, the whimsical and the imaginative questions in favour of the strictly SE-answerable types of questions, then we really defeat the purpose of our forum's existence, which is a Q&A forum for worldbuilders regardless of their skillsets, level of practice, knowledge base or preclivity for prior research.
I see no problem with helping (especially) new users learn how to ask good questions; but I really don't see the point in closing questions like this just because of reasons. The OP doesn't learn how to write a better question certainly; other users who might be considering a similar aspect of their own worlds gain no insight from the community; other users who already have this as part of their worlds gain no further insight; those of us who have insight or experience or knowledge to share are cut off.
Generally speaking, I'm all for closing queries that are egregiously inappropriate for this worldbuilding forum (story based questions, do my homework requests, maths questions, strictly primary world questions, extremely broad questions). I am much less in favour of swift closure of "opinion based" queries. After all (and I've said this before, too), worldbuilding is by definition and by nature a matter of opinion!
I'd be much happier if the more experienced users would make less use of the cleaver and more use of pencil & eraser! In other words, rather than close these questions, edit them and make them into good worldbuilding questions! If the OP doesn't want to play along (and I notice the OP of that question has chosen not to alter her query any further), that's fine with me. I see no reason why one or more of us can't (gently) seize control by paring down what should be excised and building up what might make for a better or more helpful question.