Trains can go faster, but have a stricter schedule. Cars are extremely convenient. You can leave when you want. Want to be in a city at 8 am? It’s a hour away by car so leave by 7. However the only train getting there before 8 leaves at 6. But it takes 20 minutes to get to the station. Or, if we go super green, it take 45 since your walking. You need to leave at 5

It’s similar with a bus, but more manageable when most stops have buses stopping every 15-30 minutes. So for a bus you may need to leave at 6:30 or whatever to make it on time.