You’re right that healthy, young working adults without children have very little to gain from socialized systems. I’m going to assume that OP, like me, is an early Gen Z who fits this description, and is about to enter the job market or has just entered it. For our generation, this statement
The state is not here to rob you, but to provide you with a structure to live in that you couldn’t have in the same way on your own.
does not check out mathematically. The taxes we pay today don’t get locked away in a box to be spent when we are sick or elderly and need them. They are spent on the sick and elderly we have right now. This means that at the age that we start needing benefits more than we contribute to them, it’s not going to be us, but our children’s and grandchildren’s generation who are footing the bill. But the birth rates across Europe are below replacement level and none of our countries have come up with a system that either raises birth rates above replacement level or successfully introduces foreigners who will be net tax contributors for all their lives. That means that despite paying high taxes and receiving miserable salaries (compared to American salaries) today, we won’t even be able to enjoy benefits from the state in the future because there won’t be enough tax contributors by the time we need these benefits.