I'm not sure this is a conversation about the evils of metrics. I don't think you'll find anyone who runs any electoral campaign, does any voter registration, implements GOTV programs, or builds membership-based organizations who doesn't whole-heartedly believe in setting goals, tracking numbers, and demanding accountability to them.
If there are no goals then it isn't a real effort, it's just feel-good civic masturbation.
For me the real question is what is canvassing and what is organizing and why is the difference crucial?