It has been said in this thread that we shouldn't scan healthy people because false positives. That's a good point. But I also think we are still looking at the small picture: catch diseases.

The slightly bigger picture is to prevent them, and there early warnings can help a lot.

At a yet slightly higher level, some people think that we are about to enter the age of superintelligence. That's a separate debate but it's not something I would disregard entirely. In an age of superintelligence, our goals and tools for healthcare can be different. I'm very much doubt that the medical establishment and we as a society will embrace a world where each person has some model of their metabolism running on some hardware and being updated and monitored 24/7, but this is already a reality in many industries where it is called "digital twins", so maybe this is something you'll go for if you are a trillionaire.

Zooming out and flying higher, the goal is of course to be young forever and let your body stay away in state space from most diseases. Is that something superintelligence can do?