I agree there is little urgency. After all, if there were, the withholding of information would be devastating, not just annoying.

But you're right that having a low priority Slack channel that you can casually look at when you're at a natural stopping point is way less disrupting than having to drop everything you are doing because the clock says it is meeting time.

I wonder sometimes if people who get engrossed into this meeting culture have just never experienced better? Anything can seem like a good idea if it is all you know.