1) If you need metrics to answer those questions you have a larger problem than metrics can solve.

2) That's an argument for literally any possible metric. You could make an equally passionate argument that looking at and keeping track of free/busy times on calendars or soda consumption or how full the garbage cans are on the floor as an indication and early warning sign that something changed. It doesn't mean those are good things to track. Pay attention to the things that matter. Align whole teams and organizations around those things. Don't let them get distracted with metrics that don't matter.

3) Metrics are a double edged sword and influence behavior. If you're tracking the wrong things, you will get the wrong things.