There's nothing wrong with hypothetical questions as such, e.g. "Will my piston engine keep running if I have total electrical failure?" is a hypothetical question but it's clear and has a definite, useful answer.
The hypothetical questions that cause more problems are ones like this. It's very broad, makes a lot of assumptions and is really a 'movie plot' scenario. I think those are the ones where we should close the question, suggest a discussion in chat, or at least push for a much more specific question.
As for the airliner spin question you're referring to, I think it's really a dupe of this one, or at least it would be if the OP had some more background knowledge about flight. But of course that's the entire point of asking the question.