The post is as much a reply to you as it is a reply to your commentors. "Stupid" was used a little more liberally in the comments, and my post just exaggerates that for humor's sake.
My main point is that it depends on your audience. For most things I would develop, my primary audience is probably going to be from the US, so I should take that into consideration. If my analytics show a higher percentage of international users than I'd expected, then I can go back and spend more time developing another form for outside the US. It's all a matter of priorities.