I think it is wrong to judge someone's art because one person might not like it but other people might love it. It is like food critics. They may have different taste buds than other people. Also don't let other people change your opinion. If you love this certain food dish and the critic doesn't like it, don't change your opinion because one person doesn't like it. So that is why I think it is wrong to judge someone's art.
I believe that art is an expression of what the artist is feeling, if that person is a smarter, more logically thinking person, they might take a more formal approach. I hope this answered your question!