I think the point of what they're saying is that the algorithm largely doesn't bring additional biases. This paper is showing there's a detectable difference b

I think the point of what they're saying is that the algorithm largely doesn't bring additional biases. This paper is showing there's a detectable difference between the criminal and non-criminal faces in their dataset. Obviously, this would be the case if criminals actually had different faces. However, it could also be the case that people with more extreme faces are more likely to be convicted. That is, this paper could be showing that their dataset is biased. Personally, I find this paper really interesting. I wouldn't have previously believed you could train a classifier so accurate just from facial images. It could be revealing some really strong biases in the criminal justice system and I'd love to see this kind of work used to help combat human biases rather than simply reinforce them (which seems to be how most people envision this will be used).