If your intention is to learn something, it is good to study
other people.
As long as you can refrain from doing any unwholesome deeds after
seeing their mistake.
Sometimes we may think that we criticize out of goodwill, but
subconsciously we are doing it due to ego.
After attending a dharma talk or discussion, one should always
contemplate the teaching, to see how to apply the theory and change
yourself.
speaking on dharma talk, did you go to the HH sakya trizin
conference recently?