I think its a question of path dependency. You can evaluate a piece of work, without being dismissive; being to quick to judge; being toxic rather than constructive in your criticism. Etc. The phrase "judgemental" has an idiomatic meaning in english, akin to burning bridges before they are crossed.

I think his point is that sometimes "judge" is used to mean "evaluate with a negative outcome"; it's not judging in that sense until the evaluation comes out negative. It's hard to tell which sense is being used.