All metrics are gameable. I think I once saw a study that suggested that every metric applied to professionals ended up having a net negative effect on actual productivity - by and large people understand their job and want to do it well, and while a metric may incentivise the few that don't, it also ends up distracting the majority.
I suppose there will then be incentives to exaggerate or "invent" new risks for career advancement, but is that not preferable to the alternative?