At least, because previously Arsenal managed to beat Manchester City, of course, this factor will make it predicted that Arsenal will also win against Chelsea. After all, we are all aware that Chelsea's situation and conditions have been devastated since last season, and have not improved until now. Therefore, it is natural that Arsenal remains the team that is projected to win this match and as such, the home and away factor is no longer important at this moment because on paper Arsenal will definitely win.
From this point of view, I agree with you, Arsenal has a greater chance of winning than Chelsea even though they act as hosts at Stamford Bridge. Both clubs, Arsenal and Chelsea, have spent quite a lot of money to build their squad this season, but Chelsea under Pochettino command have not managed to find their best form so far. So the performance benchmark in Chelsea previous match cannot be completely relied on, on the other hand, Arsenal looks promising because they have not been beaten this season.
However, this match is full of prestige, even though the two clubs have different match records, they will present their best game. I think Chelsea has the ability to make it difficult for Arsenal to get full points, but we'll see how the match ends. What is clear is that if Arsenal succeeds in beating Chelsea, Arteta squad deserves to sit on a par with Man City in the list of contenders to win the EPL this season.