And what evidence do you have of that? I see none.
Well, it seems we see things differently then.
The concensus seems to be that everyone should stop to allow a funeral procession to proceed, regardless of police escort or not.
Me, and some others, have pointed out that these processions can be very disruptive to traffic flow.
Traffic flows for a number of reasons and it isn't all just people out for an afternoon drive that can easily afford to wait several minutes for a procession. Some people are legitimately in a hurry to get where they are going.
Included in that are emergency responders. If you don't understand the impact of a blocked roadway on emergency responders I suggest you give it some consideration. If all traffic comes to a stop, it blocks traffic in many places. That significantly increases response times for emergency services.
Consider this, you have a cop blocking traffic in an intersection waving the funeral procession through. An ambulance is coming across that intersection, has a green and is expecting to be able to get through. Coming up on the intersection the driver now sees the cop and has to come to a stop and wait for the cop to try to stop the funeral procession, who are mindlessly following the car in front of them secure in the knowledge that the cops are blocking traffic for them and they don't have to stop. The cop has to get the funeral procession to understand they need to stop so the ambulance can proceed. Great. Job done. Ambulance only delayed 20 - 30 seconds and accidents crossing this now very high risk intersection avoided. And, 30 seconds behind the ambulance, here comes the fire truck. Rinse and repeat. If you don't think this happens regularly in a city like Toronto you aren't thinking of the volume of emergency responses.
None of this is even addressing the hazard posed by the escort itself which has also been alluded to before. Escort duty is very high risk for cops.
Personally, I don't see the need or value of it.