I disagree that they're overthinking it, and you haven't addressed (or perhaps you overlooked?) their main point, that if this is true then you should have thou

I disagree that they're overthinking it, and you haven't addressed (or perhaps you overlooked?) their main point, that if this is true then you should have thought about that before opening _this_ link, instead of the links on this page. This is more to say that this is a disagreement between you two at the object level, not someone overthinking a simple matter.