Maybe, but they should not have Rumple say this line. He should have said something like “This is not important right now, what’s matter is…” or something that imply that he knows the reason. “Your questions are pointless” is insulting, it’s like I’m not being resprcted as a viewer and they just expect me to not think about it and just go with it. Some viewers are fine with it, I’m not.
Well perhaps Rumple doesn’t know the answer. Or he’s keeping it close to the chest. We don’t know yet. I don’t think it was a reflection of the writers not knowing the answer, I think it was Rumple not knowing, or more likely, not divulging.