Hahaha, hilarious. I could also tell a story or two like that.
I have to say, though, I have no idea what the management is thinking when they hire such clueless PMs. Even worse, I have seen clueless product owners who had no idea about the domain we were in. I guess a recent example could be Ive designing the Luce.
Maybe I am just envious. Maybe I just wish I could BS my way through life like these characters do.
There's nothing to envy. They're a hired punching bag to put distance between you and the management.
In most cases, even the PM doesn't know this. They were specifically selected to not think too deeply. Anything you say that is brutally correct and they take the wrong way is received as mean and arrogant. Those incidents give management some ammunition if they ever want to get rid of you.