I understand the sentiment. That's the current status quo: keep things verbal, keep them fuzzy, keep an escape hatch handy (i.e., plausible deniability). The whole point of bi-directional accountability (via CBC) is to shut those doors up front. Once you (two or more parties, e.g., leader/report) agree to "do" CBC, you're immediately bound by the methodology, which essentially means a work contract you negotiate and sign off on. Escape hatch removed. The system makes deviations visible, costly, and merit-eroding.