Please take a look at the PULSE model card here:

https://thegradient.pub/content/images/2020/06/image.png

PULSE is published as an art project, not suitable for face recognition or upscaling. It can only generate 'imaginary faces'.

They didn't even train the GAN they were using, it was borrowed from another paper. They probably used StyleGAN because it was a nice high quality generator and they invented a novel way to use GANs so they needed a toy model to showcase their algo.

Agreed. I was only pointing out that even bias is a matter of bias: if white faces had been depixelated to black faces instead of the other way around, the authors could have still been accused of a racist bias (because of the hypothetical scenario I've described above).