

The entertaining question would be: what do the salaries of the new employees look like, compared to the old ones? I’d suspect that the administration is thinking they can fire a well experienced, but expensive employee and hire on a cheap replacement. However, I also suspect many of those positions are fairly specialized and they are going to end up paying to get rid of all that experience and then end up paying a premiums to hire someone with the needed experience for the position.
The short answer is, it’s what we were taught in school. Like many preferences, it’s shaped by the culture we grow up and live in.
Of course not, you were raised and live in a different culture; so, your preferences are different.
Ultimately, the right answer is ISO8601. It’s unambiguous and sorts well on computers. But, I don’t think any culture is teaching that as the primary way to write dates, so we’re stuck with the crappy ways.