Yeah I see what you mean. I don't think IRC notifications are useless, but if they are in a different channel I can set this channel to be silent even on messages with my nickname. At the moment I get notified of my own actions which is extra annoying.
The use case you described still generates less messages than notifications :-) On top of switching to a different channel, we could maybe also limit them, like only notify on PR & Issue status changes (opened, closed, reopened)?