I agree they shouldn't be factors, and my example is a bit contrived, but many do include socioeconomic and location based factors, like this reply by the autho

I agree they shouldn't be factors, and my example is a bit contrived, but many do include socioeconomic and location based factors, like this reply by the authors of a paper on one recidivism calculator (who argue here why socioeconomic factors are included) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5047350/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5047350/