@Joseph
I would agree that most Yeshiva Bochrim don’t have cars,
BUT:
If you look at the subset of Yeshiva Bochrim who were raised in suburbia or small town America where mass transit is non existent, you will find that many of them do own/have cars. They use them to get back and forth to their parents homes, and even perhaps take part-time college classes or a part-time job. My grandsons each put in a half day each week at my brother’s NYC law practice. This provides them experience and a sense of self worth. They earn the money for their visits to the pizza shop, etc.
Some of them don’t live in the Yeshiva dorms and use them to commute. I have another grandson who drove back and forth to Yeshiva High School from the time he was 16. He now is in Mesivta and drives from home each day and will do so for the year. Next year, I”H he’ll learn in EY and there he’ll not have a car.