You can make a “I hate you so much” “I don’t think about you at all” meme out of it if you want, but the fact is that American media, most notably Hollywood has an immense cultural impact in the western world. People are often confronted with the weird system that Americans use, but not the other way round, let alone come across something like the danish numbering system. It’s less obsession and more unpleasant regular occurances that lead to such strong opinions about the American system.