In the UK we have a lot of engineering works always going on with the rail network, so you often have to be stopped at a station and taken part of the way by bus, before getting back on a train for the rest of the journey.

Or people live too far to walk to the train station.

And in general our public transport isn't that great in the UK. It's normally good if you live in a city or large town, but go outside into the rural areas and you have very limited services. For example where I grew up in the New Forest (Hampshire) we had one bus per hour running from 8am till 6pm. Before or after those hours you couldn't get public transport anywhere and so if you didn't have a car you needed to either walk, cycle or book a taxi. And the nearest town being 5 miles away.

That was a nightmare when I was growing up. If I wanted to meet friends in Southampton I would either have to go home around 6pm which wasn't good, or try to arrange transport with parents or if we were lucky a friend who could drive.