I don't know what you think. However, in the match with Sevilla, the Manchester City team suffered greatly from the absence of Kevin De Bruyne. Because he is one of the attacking players. Another player playing in his place would not be able to build a great understanding with Haaland in attack like him.
The name of the substitute player will definitely never be the same as the one who was replaced, and it looks true that without Kevin De Bruyne up front, Manchester City looked a little overwhelmed in the match with Sevilla. But Manchester City also found what they wanted in that match, which was a win even on penalties and Manchester City certainly wouldn't be so sad even without the presence of Kevin De Bruyne in the match.