It is not wrong actually. Despite Pogba's absence they still succeeded in defeating City 2-0 away which was great for them. Pogba has played in 28 matches in total - 4 goals and 3 assists. But I believe he is still one of the valuable players for this team. Unless they find a better alternative, I'd like to see him continuing at Manchester Utd. But we should also keep that in mind that he has only one year left on his contract. They should make their final decision about Pogba this summer and act according to it.
Keeping Pogba is indeed a pretty good choice for Man United, but if the player concerned has stated that he does not feel happy and there is no desire to renew the contract, then a sensible option would be to sell the player while he was still under the contract.
Even though Pogba's contract with Man United still has more than 1-year remaining but if there is still no agreement between Pogba and Man United until the contract expires, then Man United has the potential to lose a lot of money because Pogba can go anywhere on a free transfer.