I find this sentiment almost offensive. Like it goes against everything I believe to say that less data is better. But the root of it is pretty clear "even basic blood tests can lead to unnecessary interventions or treatments". It's the belief that a test leads to interventions. But it doesn't have to of course. An intervention is a decision, and if an intervention is likely to be unnecessary, then they shouldn't intervene. "But the yadda-yadda-value is elevated", yeah well you said it yourself it's most likely nothing, so do nothing, just note it down for future reference.