The control protocol spec wouldn't be part of the physical connector spec, other than setting some minimum requirements so the connector meets the control proto

The control protocol spec wouldn't be part of the physical connector spec, other than setting some minimum requirements so the connector meets the control protocols assumptions. The control protocol is, necessarily as your concerns point out, made so that things like resistance, water, dirt, and bad connections, all things that are expected states of connectors, don't pose a significant safety hazard.