We have clinical trials for that. I’d also suggest that the first step in offering fixes for a complex problem should be educating yourself about the nature of that problem.

Extremely expensive and time consuming clinical trials. If we’d increase success rate by even few % by selecting better candidates it would be huge.

There’s no indication of ML systems expediting the clinical trial process, only the “brainstorming” part.

We are talking about future research directions, not what's possible today. Given the success AI has had in virtually every domain its been deployed in, there's no reason to think it won't do well simulating physiological processes.