Arteta needs to be consistent to win the Premier League, if he and Arsenal can repeat every year as stable as it was last, then sooner or later they will reach their goal. Moreover, if this cannot be achieved this season, then there are rumors that Guardiola can leave the team next summer, then City can become a slightly different team, but I think Arteta would be interested in becoming a champion, while Guardiola is a coach of City.
Arsenal has been on a very good track in the last few seasons, but the question is will Arteta be able to bring Arsenal consistently enough every season? If he can bring Arsenal consistently every season, then I agree that sooner or later they will be able to win the Premier League title. Arteta has very valuable capital now, because the players he has are also players who have been at the club for a long time, so the chemistry between them has already been formed, and so does Arteta, he definitely knows the abilities of his team.
If Pep Guardiola leaves Manchester City, then I agree that they might be a little different and they might not be any better than they are now. However, it is still a long way to speculate there, because Pep Guardiola himself is still at the club at the moment. Arsenal don't have to think about that, because if they can be better than Manchester City then they will be able to shift their position from Manchester City.