But that's true of most, if not all, of the top teams. They're called great players for a reason. The difference is we have been cursed with injuries forever, whereas the other top clubs seem to fare better. When was the last time we went into October without a single injury at the club? (Xhaka might be injured actually, but you get the point)
Credit to Arteta, he's spent his money on players that have very good fitness records. Ramsdale, Tomiyasu, White, Gabriel, Partey and Ødegaard are all 30+ games/season players in their careers so far.