Even the average radiologist is high variable, not to mention inter-reader variability.

Under-rated comment here. The question is not whether some AI beats experts, even though the conclusion of this paper is clearly that the state-of-the-art AI does in fact beat them, but whether they are going to beat the radiologist at the free clinic in some poorly-served place.

The US healthcare system has little correlation between price and care quality. More expensive providers don't reliably delivery better patient outcomes.

Do you know where there is more info on that?

This is a good start.

https://journalofethics.ama-assn.org/article/complex-relatio...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4863949/