For most of human history, people didn't have to worry about

- Exposure to exotic chemicals in every day items

- Regularly operating a multi-thousand pound machine just to travel

- Adversaries thousands of miles away working tirelessly to misinform and scam you

- Massive conglomerates working tirelessly to manipulate your behavior

- Being compared to the best in the world (in their skills and hobbies etc.)

- Competing against literally the entire country and sometimes the world for labor

My point is, modern life is getting more and more complicated. New challenges pop up every day. Each subsequent generation is born into an increasingly challenging situation. It makes sense that it takes longer to get ahold of things and feel stable enough to start a family