What is that certain age? I feel there is mostly some kind of social pressure and fear of missing something important in life. If people could safely get kids

What is that certain age? I feel there is mostly some kind of social pressure and fear of missing something important in life. If people could safely get kids at any point in life without any influence from age I'm pretty convinced most would do it much much. Right now from my experience maybe do it because they feel "it's now or never" and "never" is scary because you could be missing out on something great.