Thank you for the story.
People often have no idea how to treat animals, and you have pointed out a really stupid and avoidable example.
That is something some people do here, too. As bad, they ride the bike in traffic with the dog running beside them on a leash. One such owner lives across the garden from me. He had a nice pup - a sort of brownish Alsatian wirh black, erect ears. He used to exercise it as described, from his bike. He works, and the dog spent all day on a terrace. I noticed that it had stopped barking when people walked past his apartment, and I though wow, it's finally learned who belongs to the area and who not!
The next time I bumped into the guy I asked about the dog and he said oh, I had to give it away to another guy who already has several; he's got a large area of land. Mine began to bite people...
He seemed surprised about that. It's equivalent to locking somebody up in solitary for a day at a time, every working day; of course the poor thing became nervous and anti-people. It's sad that what happens is that apparent love of animals is enough to make folks get them, but they then go on to give them dreadful lives, probably without having the slightest idea of what they do.