I'm one of those freaks who have this on and I honestly like it a lot. It gives me a feeling of certainty, grounding, and precision.
Primary driver for turning it on was their redesign of the clock flyout to be, uhh, nonexistent with Windows 11, which I'd previously use on demand for seconds information. I was also worried about this being a nonsolution and a distraction initially, but it ended up being fine.
I've met managers who literally lock the conference room door when it hits :00.
That's a little crazy in my view, but there are definitely places where it's the norm.
There are basically two ways of managing expectations around meeting times. The first is that it's acceptable for meetings to run late, so it's normal and tolerated for people to be late to their next meeting, and meetings often start something like 5 minutes late, and you try to make sure nothing really important gets discussed until 10 minutes in. The other is that it's unacceptable for meetings to start late, so people always leave the previous meeting early to make sure they have time for bathroom, emergency emails, etc. In which case important participants wind up leaving before a decision gets made, which is a whole problem of its own.