I think it makes more sense when managers pick players who are in poor form but have proven before that they can do it at that level, I can see that logic in hoping they play back in to good form rather than benching them and risking breaking any remaining semblance of confidence, perhaps irreversibly.

That makes more sense to me than doing the same with young players who may or may not ever be good enough.

I saw enough from Bakayoko at Monaco, including at the business end of the CL, to suggest he could still end up a good player who just had a nightmare few months in a new League. He did eventually get a break from playing and actually looked decent again when he came back (and he had a good few games this time last year as well). I hope he plays regularly and does well over there.