I don't have to be a chef to know if something tastes awful. I don't need to be able to make a movie to know if something's boring. The same goes for art or any other medium. But I'll stress it again - you have no clue who I am or what I do, so you have to only work with my arguments (to see what makes most sense to you). That's why I love to keep my gallery empty, to see people addressing this fact over and over again and get nowhere.
I don't ask you to respect me or any of that bullshit; I ask you to prove me wrong. What you do is simple derailing from the actual matter - trying to insult the person instead of arguing about the subject.