From the information I got from a sport news it seems with the nature of the injury he may not quickly recover for him to participate in the world cup , Paul Pogba is an essential player to national team not just to the club he belongs. Paul Pogba is a player full of talent , am still wondering who can cover up his position that will deliver a good performance just like him.
Actually I still feel in this case he is a little selfish when he doesn't want surgery and makes a pretty real bet for his future career.
But this is quite natural, the World Cup is one of the goals of great players and of course Pogba does not want to miss that. But obviously by choosing not to have surgery as soon as possible this still doesn't rule out the worst thing is that he could be seriously injured at any time even though we don't expect that.