It's not the worst filter. The worst filter is the one that's highly correlated with other popular bad filters. Because that way you miss out on the people that

It's not the worst filter. The worst filter is the one that's highly correlated with other popular bad filters. Because that way you miss out on the people that are generally discriminated against, whereas a random filter is more likely to pick them up by chance. Optimization can be counterproductive, and it's related to what other people are optimizing.