It doesn't cost 2-3 times as much. Especially as business traveller you pay a flat price lower than semi-nice car would cost per year. Many 'normal' travellers

It doesn't cost 2-3 times as much. Especially as business traveller you pay a flat price lower than semi-nice car would cost per year. Many 'normal' travellers use this too. I often travel first class when I find tickets on sale. Sometimes I plan my travel around good ticket offers. 6.5 hour train ride first class for 30€ is a thing. Normal price is ~€100. Gas would be about 60€ so it is cheaper anyway as soon as you are two people.