In general, I would say no. If a theorising question happens to get a satisfying answer, then we'd be silly to remove that question. We enact the wording of rule 1.4 that says it's taken "case-by-case".
At the same time, I would like for there to be leeway for staff to make quick calls on questions that are clearly rubbish. I don't want to wait three days (or however long) to see if Junichi Masuda has commented on why Wooper can learn Dynamic Punch.
If Masuda really did comment on that, would we leave the question up? Probably... but we're trying to operate within reason here.
Does any guess or theory count as a "satisfying answer"? I'm sure you already know the answer is no and there is no pleasant way to moderate this. It's our job as staff to make a call. If we think the question is aimless then we should close it. If there really is a weird nugget of trivia to be enjoyed then we shouldn't be a killjoy.
We already leave closed questions public for two days before we hide them. I think this is enough time for the tragics among you to do that fateful google search that decides whether the Wooper Dynamic Punch question is going to be answered.