I don’t think any of the model rules preclude consensus decision making - indeed most (smaller at leastr) coops proceed in that way. Votes are rare and unliked.
The bottom line however is that the model rules - often (but not always) backed by FCA regulation - all guarantee that members have the final say. That is seen in terms of votes - they have no other way of demonstrating that a choice between two options has been decided by members. This becomes a real issue when there is no consensus either way.