It’s a problem of reliability. If you need to be at work at 08:00 and your train is regularly late or getting cancelled, you can’t take the train to work.
Not to mention even a small delay could mess up the timing of taking the next bus/train. For not too busy routes it could mean waiting in the cold for half an hour… If that next bus has a good delay you could be there for almost an hour. (Totally not speaking from personal experience)
That’s still more trains than in the US
It’s a problem of reliability. If you need to be at work at 08:00 and your train is regularly late or getting cancelled, you can’t take the train to work.
Not to mention even a small delay could mess up the timing of taking the next bus/train. For not too busy routes it could mean waiting in the cold for half an hour… If that next bus has a good delay you could be there for almost an hour. (Totally not speaking from personal experience)