I'm not sure what you're trying to say. Do you mean that non Germans should refrain from buying these tickets?
They’re for making short, local trips more affordable in a country that has a lot of people struggling with fuel and inflation, and for encouraging drivers to consider transit instead more often, and long-distance trips to the sea shore and mountains are a nice side benefit that is a pleasant thing to discuss when we all feel like there’s a shortage of pleasant things to discuss.
That they’ll make local transit uncomplicated for visitors (no trying to work out where to buy a given city’s tickets, or exactly which fare you need for a particular subway ride!) is also a nice incidental, and I, a taxpayer here, will be happy to see tourists using them, but that’s not why the Bundestag is spending 2.5 billion EUR on this.
There arent that many travelers in summer so By making it cheaper you promote tourism and people appretiate it.
The “you shouldnt nuy it its not for you” people just have no idea and probably dont even use trains or live in the area.