I think modern medical ethics demands a physical treatment for literally everything and anything that's discovered, including quite a few that either aren't physically dangerous (e.g. atypical brains) or are inevitable (a 90+ year old with a laundry list of conditions). And, as other comments have pointed out, a panicked surgical response to a mammogram isn't based on time series data.

I totally understand and agree with trusting that medical professionals "know better", but I also would not conflate current practices with absolute perfection. It's clearly not a perfect profession or practice.