I don't think anyone has got it in for the lad either. But young players have to show some signs of why they're in the first team. You can rack off why Nkoundou, Gordon etc get game time, as they're showing flashes of something that's makes you go "Ah I see".
That something doesn't even have to be top quality, whether it's work rate, possession, pace, aggression - something that makes them standout.
I see zero in Kean. Absolutely nothing. If anyone says "pace and power" I'd say when?
I'll say it again... Anichebe looked better and offered more at the same age.