Month Day Year makes sense to me because I feel like it's on order of importance when finding out when something happened. Like a month is used a lot to estimate things when you don't know when. Like early june, middle of june, or late june. I feel like it's used most for giving dates. Then days are used, they give you no idea of how long until something is unless it's in a short time period. Finally a year is the broadest term for identifying a date, it's only used for very broad scales.
This might make no sense and be my way of justifying month/day/year but really how is it confusing to use, and why would we bother switching. It's not like metric system where it actually has benefits, just people bitching they're superior with their stuffty date formats.