Which businesses succeed without a business plan?
Without metrics, how do you keep your runway open?
So as I've said elsewhere, the problem isn't measurement. The problem is as Deming said "The aim defines the system". Well thought out measures in accordance with clear goals and aims can be valuable. Like anything though, it requires careful consideration and may need to be revised based on outcomes.
You focus on your goal and try and take the best path there. LoC written or test coverages are distractions imho. Trust the skilled talented people you’ve hired as they are motivated to make the correct choices.