Sorry but that has to be the most contrived and ridicilous statement I've ever read. And this is coming from someone -- me -- who owns two cars, lives in Berlin and practically never uses public transportation.
In Germany the trains are also faster than cars on the Autobahn, even if I theoretically could drive 180km/h. All my travels from Dresden to Berlin, Leipzig or Frankfurt are faster by train than by car. ICE only.
Now with this offer, the slow RE trains only, it's slower than by car, but still more attractive. Just if I have a meeting far outside a big town, and bad connections (say the bus only goes every 30min) and I have to walk 10min, I'll take the car. For my next travel to the Leipzig Kanupark I'll take the car, but all other business and leisure trips are by train. For the last 3 years already.
Short 3.5 minutes Docu:
https://www.youtube.com/watch?v=dOL0MZQiELI
Long Cab ride:
https://www.youtube.com/watch?v=Zg608B6CgC4
Track: https://en.wikipedia.org/wiki/Wanne-Eickel%E2%80%93Hamburg_r...
That's the pessimist's view. The optimist wanders around and randomly finds a place they would never have found otherwise. I mostly do the first. Sometimes I find something truly interesting. Sometimes not, but I don't think the unproductivity you mention has harmed me. (Yes, occasionally I absolutely have to hack something, so I search the first place where I can use my laptop. But I try to avoid that in all but the most familiar cities.)