We've been without key players enough over the last few years, probably starting with Salba's absence in the title run of 22/23 as being the most significant in recent times, that it's now not a bug it's a feature of the system Arteta has.
He was backed heavily in the summer to bolster his squad to mitigate absence, injury and fitness issues.
His job isn't to win the Premier League or Champion's League when he has his first XI available, it's to win by using his squad to it's maximum potential.
If he does, then super and I'll give him his credit for doing so. If he doesn't, the injury issues don't wash with me.