I believe that's what the data says, but I have a really hard time reconciling it with common sense. More information is strictly better than less information, because you can always choose to ignore the extra information.

I would say most medical decisions are made either due to statistics, or due to experience. What treatment has the highest chance of making the patient better, extending their life, or giving the best quality of life? You'd "just" have to adjust the tables for the new test.

I mean in a contrived example, you could have the lab technician themself look up the numerical result (xyz > 100, abc < 10 whatever) in some table, and then there would be the rule to throw the result in the bin and report "don't treat" because this results in the best outcomes. I don't want to have all that extra diagnostic information, but I want my doctors to use it conditionally to improve my treatment if possible.