There is a difference too in being "Judgemental" and making a judgement. Your judgement is that the decision your niece has made is not a bad one, it may not be what you, or I, would do, but overall it is not bad, not doomed to disaster. That is a judgement, an assesment of the facts.
To say the decision is wrong because it is not for you, would be judgemental.
That is the problem with the JW mindset, they are right, and their is no room for an alternative opinion to be as valid as theirs.
It is their way, or it is wrong.
You cannot get much more judgemental than that.
This attitude also takes away from the JW the ability to have empathy, understanding and to exercise compassion, it estranges them from the people they are judging.