There is little plausibility to the claim that it is absurd to criticize anyone for being critical.
Intermediate Conclusion
There is little plausibility to the claim that it is absurd to criticize anyone for being critical.
rephrase: It's coherent for someone to criticize someone else for being critical.
Premise
Obviously, people must assess one another and not all assessments will be positive.
Main Conclusion
However, there is wisdom behind the injunction against being judgmental.
rephrase: It makes sense to try stop someone from being judgmental.
Premise
To be judgmental is not merely to assess someone negatively, but to do so prior to a serious effort at understanding.