I remember as a child that was an automatic thing to do. That is to pull to the side when a funeral procession is going by. But today it seems people are in a hurry to do everything. They will cut through a procession and go about their business if they do not see a police escort.
I have felt like doing the same thing when the procession seems to have an usually large number of cars in the procession. I feel impatient too but out of respect for the family and deceased person I wait until it ends or I make a U-turn when I can. But I will not cut through the procession. I think that is disrespectful.