Mauricio Pochettino is not an amateur when comes managing a top club in the English Premier League abd that's why I'm very optimistic that he surely does know why he's allowing many of the first team players at Chelsea to leave.
Pochettino surely has his own tactical style of football and wouldn't want to keep players that he knows would not fit in to his style. Chelsea I believe will do well under Mauricio Pochettino
Pochettino has only coached one English side prior to now, and that is Spurs, and i don't know if Spurs are in the category of a 'top club', they don't wn trophies, neither did they win when Pochettino was manager. Having said that, i am a huge fan of Pochettino's style of football, and that's because he plays an offensive and attracting game, under him Chelsea will definitely play better than they did last season, but i don't think he stands any chance to win a trophy next season.
We all know that every coach has a different strategy and regardless of Pochettino's experience as Spurs coach, maybe he wants to do a major overhaul and has a desire to bring in new players who want to be added to the Chelsea first team as well as to let players who are not needed out of the main squad. , It's clear that Pochettino has a tough task to fix Chelsea, which slumped last season, so he really has to completely overhaul the main squad at Chelsea.
Of course it is difficult to target Chelsea to win the league next season because of a position that does not allow for that and it takes time to adapt to Chelsea players in the main squad, at least Pochettino can raise Chelsea from a slump and bring Chelsea to qualify for the top 4 next season. already good enough, I will be happy to see Chelsea's development in the next season.