Duplex - Trouble with the Neighbor

that's exactly wrong.
That's where the error is in the system.

Oh really? How do I best get a piece of the cake without paying in? Seriously, I'm a poor sucker and need the money.

I would never think of discussing that with other people. Especially not with childless people

Yes, I don’t discuss that either. Sooner or later, you are labeled a child-hater. Different rules always apply to families. Eventually, the parents also get older and belong to those who expect a bit more discipline from others. Edit: The parents themselves know that the neighbor's child is crying. Often you can hear the sigh in their voices: ".. Don’t scream like that, Dad is next to you," "Yes, child..."

It should actually be about the neighbors here and not off-topic about retirement

We are on the way back and will reply later on the topic. Our future neighbor is retired. So there is a connection to the topic of retirement through 13 degrees of separation. But unfortunately, I cannot contribute to that.

There are often screaming children and there are inconsiderate people who can become very loud, especially when drinking

= both are permanently annoying

With the children, I then blame the parents, with the adults, themselves.....

Yes, I’m not debating that either. Sooner or later, you get labeled a child-hater. Different rules always apply for families.
At some point, parents also get older and belong to those who expect a bit more discipline from others.

Edit: the parents themselves know that the neighbor’s child is crying. Often you can hear the sighs in their voices: “… Don’t cry so much, Dad is next to you,” “Yes, child...”

Yes, children or families with children are legally and socially preferred. I basically think that’s right and believe that in Germany it still doesn’t really “pay off” to have children.
Maybe I’m a bit more liberal-minded than others. But I really don’t care whether someone chooses to have children or not. I too sometimes long for the freedom of being childless and understand very well that children can annoy other people and do so.
And even if someone hates children… so what? For example, I hate cats. That’s just how it is for me.
Still, I believe children have the right to play loudly. Personally, I have expectations for my children or their upbringing. But I simply won’t discuss that because it’s far too individual.

Yes, children or families with children are legally and socially preferred.

Unfortunately not - at least not socially. Unfortunately, we are a developing country in that regard. I always enjoy being with my kids, especially in southern countries abroad (also gladly in Latin America or Africa). There, children are the most normal thing in the world and a normal part of everyday life. Here in Germany, you are often seen as the odd one out with kids - with my (well-behaved) three kids, you are often given strange looks (in supermarkets, restaurants, hotels, etc.). Terrible!