[brlewis]

In a good example of Goodhart's law, there's a measure that tells you something useful, but it becomes less useful when you set a target. The three points you make argue almost as much against measuring at all as they do against setting a target.

Also, your arguments center on a metric being used as a substitute for making positive changes, rather than being used together alongside positive changes. This can happen with any measure/target. For example, if you set a target of 0 cigarettes smoked per day, sure, it's possible to just stress about the target and end up smoking more. That doesn't mean the target is bad, it just means it needs to be accompanied by action to make it useful.