If the motorcade picks up relatives, the possibility that the driver is relatives is basically very small. Unless the rich second generation gets married and drives their own cars.

Nowadays, ordinary people get married, and the wedding car is either rented by the wedding company or rented by friends. The probability of relatives appearing in this range is very low, but the probability of friends appearing is quite large.

When I got married, I was a group of friends, including a wedding car and a camera car. None of the drivers have relatives. And people like me are basic operations. Of 100 married people, 70% did.