Comment by pseudalopex

The McNamara fallacy (also known as the quantitative fallacy), named for Robert McNamara, the U.S. Secretary of Defense from 1961 to 1968, involves making a decision based solely on quantitative observations (or metrics) and ignoring all others. The reason given is often that these other observations cannot be proven.[1]

[1] https://en.wikipedia.org/wiki/McNamara_fallacy