I usually just tell people not to worry about it (the main thing we care about is fixing the problem going forward) but your comment was (otherwise) so good that I took out the guideline breakage ("I'm sorry but that's the dumbest hypothesis I can think of") and canceled the downvotes on your comment.
I hope it's ok with you - I normally wouldn't do that without asking first!
Your comment would be just fine without that sentence ("I'm sorry but [etc.]")