Because a little bit of self-deprecation goes a long way.
CS
The customer says they were promised this in the sales demo.
PM
Sales demo promises a lot of things. So does the bus timetable.
↳
Then we should own it. Can you find out exactly what they were shown? I will be more enabled to tell you what we can honestly deliver and when.
Off Mute is dark PM comedy: speaking the unspeakable. Someone with urgency (Sales, CS, Exec) demands something, and the response you could never say out loud. It's self-deprecation on industrial level.
Every PM knows the questions: "What's the timeline?" "Can we fast track this?" "Steve said it's just one line of code." They come nonstop from Sales, Service, Exec, and honestly, everyone. Off Mute gives each question a funny answer for laughs. Well, but more like "laugh, laugh, oof", because under the sarcasm there's a gap in communication, which doesn't fit in a Jira ticket.
But remember, a bit of self-deprecation goes a long way. If you can joke about it, you're still hopeful and still delivering. So when you've finished laughing, have a look at the serious answer too.