(Yet another, I live in the US, therefore everyone else does moment)
This is one of the things that surprised me the most in the US. Doctors seem afraid to draw any reasonable conclusion and are more like salesmen. I'm sure the fact that you can sue for pretty much everything plays a role in them not being more confident.
I hope that testing gets cheaper and more data gets public so we can eventually have AI doing the medical scoring and with it routing/prioritizing patients.