It is OK to be Judgemental when leading a team.
How do you assess situations that you face without making bets on how things turn out? How they turn out, totally depends on people that drive it. Knowing their strengths and weaknesses helps mitigate the risks involved and results in success.
Being judgemental is not the problem but not knowing that you are judging is. If you are not open to expressing your opinions to people around you and be able to take their inputs and form a new opinion, then it is a problem.
After all, the world judges us by assuming that all the right moves were made when successful. Otherwise, NOT.
It is OK to be Judgemental