The question Will Scotland require a space agency? Is there one in the works? was insta-closed, but not before one of the closers also wrote a well-received, fact-based answer to it.
I find the logic behind voting to close a question because one believes that "answers to this question will tend to be almost entirely based on opinions, rather than on facts, references, or specific expertise" while simultaneously answering it without expressing an opinion to be faulty.
My sense is that people sometimes reflexively VTC because they sense that an opinion could be expressed in an answer, while forgetting the primarily part.
But I see simultaneously closing and answering a question potentially self-serving; it could be seen as trying to create a situation where one's answer is the only one that will appear, or at least to minimize the possibility that others could post better answers as happened here: this vs this.
So I've asked here in meta to see how others feel about insta-answering/closing, or even the insta-close itself, on slow and otherwise cooperative SE sites. On this site at least it is common to use comments to make helpful suggestions to improve questions or express concerns about potential problems.
No doubt in the various metas of the nearly 200 SE sites, some as old as a decade, this has been discussed several times. But most SE sites evolve a sense of community and there will be differences on practices. Space Exploration SE has a very well developed sense of community, so ideally answers would be those of the community here, rather than an old link from an unrelated site.
edit: aforementioned answer is currently in "deleted status"