You asked a very good question because everyone is just applauding Arsenal for their decision is signing Eberechi Eze from Crystal Palace immediately it was confirmed that Kai Havertz won't be available due to a knee injury but can the team make a difference this season and win the title? that's the big question. However, Kai Havertz injury will now give Viktor Gyokeres a tough time because he needs to be prepared to start in every Arsenal's matches which is also a good time to prove himself till Havertz returns from injury. Arsenal have really made good efforts in signing quality players who are the center of attraction in the transfer market so it's time for them to make judicious use of these players and win trophies.
Whether they win the title or not, the season has just started, and there is still a long way to go to achieve the title. Each team will do their best, not just Arsenal, who are ambitious to perform better.
Kai Havertz is injured, and that is a loss for Arsenal, but they are not short of players. Strategies will be adjusted, and players must be ready to show their capabilities. They are paid to give their best for the team. And that is what they must do.