I'll take that bet against you.
> I am guessing that there's nothing inherent in this problem that is much more difficult than other image recognition problems.
This is factually wrong. You're assumption I guess is that its a data issue: if we can just get more data we'd solve this issue.
The reality is that these diseases are complex, their presentation is complex, and compounded by different technology. There's also the issue of data complexity, x-rays contain less information compared to a picture of your dog.
We need better algos, not more data.