there are a lot of opinions out there about what he chooses to do, but I believe that a player should always put his health before everything
he is not likely to be able to play later if he does not receive the proper treatment right now, i am not about to put another opinion out there, i am just writing to say that if this treatment works for him and does not pose any risk to his health in the long term, i am absolutely okay with that
however, if this is actually a short-term solution that doesn't look favorable for his health in the long run, i would advise him to move ahead with the surgery, it doesn't matter even if he has to miss the world cup
Juventus lost because of Pogba's injury, that's for sure. But every player will surely experience the same thing and his team must accept the consequences wisely. Pogba may be able to recover faster than expected, but of course health is important for a player where it is more likely for him to rest longer in order to minimize the risk of relapse in the future.
If his recovery lasts long, then Juventus may soon find a replacement. In addition, France also will not take a big risk to call him into the World Cup squad if his condition has not fully recovered. There are many good players to replace him in the France squad, but maybe not many at Juventus.