The problem with injuries is not only that we have to use slightly worse players, but that we always play with a new team. It takes time for players to get used to each other. Its part of the reason why we start slowly in many games
This is a slight concern though they do train together.
Flipping this another way, if City were playing Luton at home with the following lineup would you expect them to win?
Ortega (Kelleher)
Lewis (Bradley)
Ake (Konate)
Dias (VvD)
Gomez (Gomez)
Rodri (MacAllister)
Nunes (Gravenberch)
Kovacic (Endo)
Alvarez (Diaz)
Doku (Gakpo)
Bobb (Elliott)
The equivalent are never perfect but you get what I mean. That City line up would contain weaker players & tgat XI wouldn’t have started together often. However, I reckon 99% of people would say they start off as strong favourites against Luton at home, even with a limited bench.
Doesn’t mean they’d win. In the same way it doesn’t mean we’d win tonight. But you would still have that City line up and Liverpool’s as being stronger than Luton’s on paper.