I have seen this elsewhere in the academy as well.
At many elite universities, professors are never referred to as Dr-so-and-so. Everybody on the faculty has a doctorate. They are Professor-so-and-so. At some schools, I’m told they are referred to as Mr or Mrs-so-and-so. Similar effect: “we know who’s cool and high-status and don’t need to draw attention to it.”
I have seen this elsewhere in the academy as well.
At many elite universities, professors are never referred to as Dr-so-and-so. Everybody on the faculty has a doctorate. They are Professor-so-and-so. At some schools, I’m told they are referred to as Mr or Mrs-so-and-so. Similar effect: “we know who’s cool and high-status and don’t need to draw attention to it.”