Absolute rubbish. If you are the manager of Manchester City you have to juggle many many things. Players who need to play their way into form. Players who need motivating. Players who need resting. Players who need a kick up the arse. You have to look at the games coming up and keep one eye on the next game too. That's why Pep is the best manager in the world and you are a geezer in a corner of a football forum.
To drop Haaland for this game, which I think you're suggesting, would have been laughably ridiculous.