We are not wired to be parents.
When we were born, we were looked after by our family. When our parents took care of us, it was easy to enjoy life and be selfish about own needs. My parents were the traditional type, they said we could only date after 18 years old. Dating is rarely a successful deal at the first try and many of us go through a few relationships in order to find someone suitable and settle down. That took a few years for most of us.
I got married at 26 and that was considered early because I have been dating for 4 years.
And once you got married, the relatives will converge around you to push you to have babies. The older you are, the higher risks and lesser energy for kids, they said. It dawned on me that it wasn't age that was a factor but health. I felt it was not about money or physical strength but more on my mental readiness...