We are often warned against being judgemental. “Judge not, lest ye be judged”, for example, reminds us how vulnerable we are to others’ estimations of us, and how likely those estimations are to be biased.
Nevertheless, we continue to make judgements, both positive and negative, because we have evolved to do so. Human brains have been “domesticated” by our need to live in groups to survive. We assess others carefully, and monitor their views of us; if those views are negative, we may be cast out of the group.