Construction costs are currently skyrocketing

Therefore, the division of politics into federal and local levels is quite good. The state level could be quite well eliminated ;)

State level already makes some sense. MV has different problems and interests than Hamburg.
The Bundesrat also makes sense. Whether it all has to be so big and inflated is another question.

But yes, I vote differently locally than at the federal or state level.

Well, alright. Where you now want to know what more than 50% "of the city-dwellers" think, while you live in the countryside, we'll just leave it at that.

Many problems will be solved in the next years/decades with e-mobility and autonomous vehicles. Then you call the car when needed, have it drive you, get out, and call a new car on the way back.
The gloomy predictions "People wouldn't accept that" can safely be ignored. Vehicles are getting more and more expensive, hardly anyone will be able to afford their own car in 10, 15 years, especially not a self-driving one.

Have fun installing the child seat into an unfamiliar car first, then uninstalling it again at the destination, carrying it around the city for 2 hours, and repeating the same routine on the way back. That is moderately practical. There are trips where the concept makes sense. And there are many trips where the concept does not make much sense. In the end, it is usually those for whom it does not make sense who suffer.

We are enthusiastic users of public transport, our whole lives. But we also live in a big city, where you are often faster with public transport or by bike than by car, and of course it is also cheaper. We wouldn’t necessarily need our car. It is useful as homeowners for trips to the hardware store and when going to the building materials dealer or the landfill. But all of that could also be done with a carsharing car (we will keep the trailer). We have only kept our car for holidays because we mostly go far out into the countryside, where you simply can't manage without a car. Usually it is Mecklenburg-Western Pomerania or the Black Forest; in both regions, nothing works without a car. And carsharing is so expensive for long distances and longer rental periods that we keep our old car until it finally dies. But a new car will not be bought. We already make most of our trips by bus/tram/S-Bahn or bike. According to my calculations, a carsharing car would still be somewhat cheaper overall, even with the big holidays, than owning our own car now. But I have also lived in small towns where that simply did not work. As many have already written here, you don’t have to think that far outside for that.

Have fun installing the child seat first in an unfamiliar car, uninstalling it again at the destination, then carrying it through the city for 2 hours, and on the way back the same game. That's so moderately practical. There are trips where the concept makes sense. And there are many trips where the concept doesn't make much sense. In the end, usually those for whom it doesn't make sense lose out.

I have also dealt with this topic since we have 2 children. They are now 7 and 9. But there is always a booster seat in the carsharing cars. That is not a satisfactory solution for me either, because proper child seats are safer. And with smaller children, that's out of the question, they need a baby shell or a rear-facing seat. In that respect, I completely agree with you. Then you could only use carsharing if you don't give up the car in between, but continue renting it. And then it becomes financially interesting, because then the clock keeps running.