Every city has public transport.
There is a large density of public transport throughout the country: trains, local trains, underground trains, busses, ferries, ...
The ticket is valid there, too.
if you are in the rushhour and a traffic jam (not an unusual problem), then the train will be faster. Plus one can work in the train or relax.
My regional train here 20km going into the city center is impossible to beat by car.
77.77% of the people live in cities. 55% live in cities with >20k people. Generally Germany is a decentralized country with a lot of regions with local center cities. There are 15 cities with >500k people. France has only four.
That car traffic has generally less problems than the train system is a myth. Check the ADAC traffic event overview on a random workday.
And that's before we get into questions like "How many of your hours of paid work are required to make car payments, insurance payments, tag, title and maintenance?"
Just yesterday I hit jackpot, as my train got delayed 10 minutes delaying my connection to the following 30 minutes later train, as it turns out, the previous connecting train was delayed for 1h blocked at the station, so I got to jump into the 1h delayed train, instead of the one that would be coming in 30m later, which got to depart 5 minutes after I jumped into it.
The poor souls on that 1h delayed train weren't so happy as me.