> Why not? – Because coworkers need to talk to each other.

There are 850,000 people on my work Slack. I do not need to talk to all of them, much less read what all of them have to say.

> What's next, jumping off the daily standup call for a while when a colleague you have a problem with is speaking?

No that's not next, and I think the goalposts you're looking for are way back over here.

I don't disagree that Slack can be a vector for "culture" problems. I don't see why it follows that employees should be deprived very simple tools that allow them to fix the symptoms themselves if their employer disagrees or doesn't care.