That sounds simple, but it's not. First, why should someone stop taking care of themselves just to avoid poor treatment from others? Second, hate to tell ya, buddy, but it doesn't work. I'm one of those pretty girls (or maybe a former pretty girl now, I'm 53). I can go out, to this day, in sweats, a baggy t-shirt, no makeup (I don't even wear makeup) and my hair just tied back and still, I'm bothered by men, women grab their husband's hands when I walk by as if I'm out to gobble them up. It's ridiculous.
Makeup or no makeup, those of us who happened to hit genetics the right way and have aesthetically pleasing faces (and maybe bodies too) can't just turn it off any more than anyone else can turn on or off their attributes and frankly, it's insulting to suggest we should. In a society that's supposed to be all about acceptance and not judging others based on appearance, it's still perfectly fine to judge attractive people. Why is that?
I won't deny there are benefits to being pretty. Of course, there are. I still don't wait in line for stuff. When I practiced law, I knew full well my looks helped things...I mean a good argument is a good argument, but it was a lot easier for the judge to accept it from a pretty package. I'm aware.
There are also big drawbacks. I've been stalked, criminally stalked 7-8 times in my life, starting when I was 10. People think I'm a moron because pretty and smart can't live in the same body. Spoiler alert, I'm not. Women are horrible to me! Not all women, but enough that it's a thing.
I could go on for days, but I wrote my own story about this same thing a year or so ago, so I don't have to, and I've think I've made my point.