Every act is rehearsed.
There is a difference though between the type of performance you'd reasonably expect to see on the little girls tuned in to on the Graham Norton, or Paul O Grady show, and the kind of act you see at a festival.
I think Klopp went past Mourinho's level in how much he found to complain about. And he did this while barely winning trophies and somehow getting massive accolades. The only league he won had changing rules and timetables.