> The argument is that travellers don't care why the train cannot move or why it is delayed

Deutsche Bahn does not think this is true and neither do I. If this was ever the thinking, they've performed or read studies and changed their mind

You can very clearly hear the drilled setup "<delay info> grund dafür ist <error category>" rigidly being regurgitated every. single. time. a delay is announced. The middle words are (per my understanding) a formal way to say "because of" and it's not something you will hear in daily life, so I presume it's the output of a committee and corporate requires them to say this, no matter if they know anything more than "the signal is red". Whether they know or not, the detail is always at a level that sounds like malicious compliance. I'd rather they say "we don't know" or say nothing at all. And if they do know, I'd hope they make up a new sentence like "someone was spotted on the crossing up ahead after the barriers closed. Someone is checking the cameras to make sure it won't come to a collision" but we instead get the robotic "we have come to a stop on the grounds of person on track". It mimics their training samples and what colleagues got into the habit of saying so I guess they think it's good like this, but is not actually helpful

Idk what creates this useless information culture, but they clearly know that passengers do want this information