I have not read the paper, but for some high level context, it's written by a team of researchers at DeepMind, and was presented at NeurIPS, so I'm going to go

I have not read the paper, but for some high level context, it's written by a team of researchers at DeepMind, and was presented at NeurIPS, so I'm going to go out on a limb and give the authors the benefit of the doubt that they probabally have some idea of what they're talking about.