Pellegrini is a very traditional coach.
This tradition mainly lies in the fact that he will establish a set tactic at the beginning of the season and then implement it throughout the entire season.
He fills in his current best players, the ones most suited to this tactic, as if filling letters, to execute his tactical system.
This is choosing players based on tactics!
This approach is also commonly used by many professional coaches in Europe.
This method has an advantage in that it creates a unified mindset within the team.
For example, if Pellegrini wants Manchester City to play possession football, then from the first team to the U15 team, everyone enforces the same possession tactic system.
If a key player is injured, I will replace him with a substitute;
The substitute comes in and still follows the set tactic, filling the gap left by the key player.
The whole team operates like a machine, running according to the programmed setting.