Why not try to look ugly?
This question is rooted in a profound confusion over our purpose with the work we do. We are not fighting beauty, but the ever-escalating, insane, unnatural beauty standards inflicted on women by a capitalistic system that seeks to make women insecure so they buy "solutions" to mostly invented problems, while simultaneously hyperstimulating men until they are incapable of natural attractions or affections for real women. There is nothing wrong with women being beautiful (thank goodness, because have you looked around? Beautiful women are everywhere, especially once you train your eye to appreciate natural beauty.).
By analogy, this is like asking a conservationist "why not destroy all the wildlife so that poachers have nothing else to destroy?" or "should we clearcut all the forests that have damaged ecologies? If they can't be perfect, shouldn't we destroy them?"
There is nothing wrong with having a reasonable routine when it comes to your grooming, styling your clothes, etc. We take issue with a culture that needs smelling salts and a fainting couch if women exist in their natural state in public the way men do as the norm. (Have you once ever heard someone remark that a man's leg hair was disgusting or unhygienic? Have you ever heard someone say that a man was lazy for not painting a face on top of his face before going in public?) The issue is the insane standards inflicted on women, not that beauty is valued. Frankly, beauty is a limbic resonator; human beings cannot help being moved by beauty. Just as a gorgeous vista can impact you, so seeing a beautiful person can too.
Because people have varying levels of beauty, we believe it is important to keep in perspective what beauty does and doesn't mean. Beauty does not make people kinder, funnier, more intelligent, or more valuable. It does make them more widely attractive, at least initially. Most people's attractiveness is a combination of their looks and their personality, so some people seem to grow in beauty as you get to know them, while others....don't.