In this situation, you would choose Pogba over Mourinho. However Pogba's experience the past two years have made him a better player because he has to adapt to a harder, more demanding league. United have been a better team with both Jose and Pogba.
If Pogba leaves and proper reinforcements are addressed throughout the squad because of Pogba's transfer money and/or players swapped for him, then we'd have to consider that.
Because Pogba is far and away the best outfield player at Manchester United and his position is so important to the team, then it's a no brainer. The poll just doesn't do the full situation justice and is an easy stick to beat Mourinho with.
If Pogba comes back and makes a fecking mess out of this situation with Raiola, then I would immediately change my vote. But one thing is for sure, if you ask who has the better interest in the club...Jose or Pogba, I'd side with Jose.