I agree with this. I would add also that we were fortunate against Villa that Watkins' radar was off and had Raya's heroics to pull off those 3 points. I understand that this is football, but I'm not sure that the 0-2 scoreline was so indicative of a dominant display.
While acknowledging that we are missing and have missed key players, I think my main gripe is that we have been timid against lower opposition, and are not playing like future champions ATM. If our defence is as good as people make out, then we should trust in our ability at the back to deal with threats and show more attacking intent. The problem with Arteta's current approach is that teams do not fear us, and for me this is part of what has made Citeh so effective in recent years. They dictate games and have half won many of them before they step on the pitch.
I don't think a safety first approach is the way to win the EPL, neither is lamenting loss of players. We have spent a lot of money supposedly raising the floor of our team. The manager needs to trust and nurture players like Nwaneri; Jesus and even Zinchenko in our current circumstances, not retreat into his shell - because their potential input is needed, IMO.