This reminds me of something that happened at my old job.

There, because I was invited to meetings a lot and many of them wasted my time, if one were doing so I’d often just get up and leave. One day, a guy I worked with came up to me and said, “I wish I could just get up and leave meetings like you do. They waste so much time.”

I said, “You can. There’s nothing special about me. One day I just decided to do it and did.”

I have a special aversion to people wasting my time and also go out of my way to avoid wasting other people’s time. It is extremely discourteous and all our time here is finite. Do not waste mine. I will get up and leave your meeting. Count on it.