My thinking is that the tool was not the problem, it was the decision to do something. With what you say about how common and insignificant is often is, then the right choice in a lot of cases is to probably monitor, seeing how much it grows over time. This isn't a cost effective solution if the ultrasounds are expensive or not high resolution enough, or if insurance won't allow you to take this strategy. If there's no benchmarks or thresholds of size or growth of the tumor before cutting it out should be considered, then you are right, it would likely overwhelm the system with uneccessary treatments. The monitoring doesn't feel like the problem to me, it's the decisions/recommendations of the doctor, often being made as a result of professional wisdom, what research was financed, and the financial system that encompasses healthcare.