Its not a “you can” problem. Its a “we don’t” problem. I cannot get to work on time (7am) using the only public transport we have (bus) in a county with a million people. Also would take about 1.5hrs longer than by car. to be 15m late (assuming the bus is on time) every day. puts it around 4 hours travel to/from work, so work takes up ~12 hours of your day.
This is one specific to Long Island, not the entire Catholic Church.