The main argument for this is usually the traffic reports. For this, Waze uses other methods, which are described in more detail in the Routing chapter. The additional information value is only for those who are familiar with the area (who do not need a sat-nav at all); those who are not familiar with the area usually do not know the names of the districts anyway. For the purely visual assessment (where am I driving and where is the flag), the entire naming is not relevant.