Why is society age pressuring so much? Why do they think life stops at 25 or 30 when it doesn't?

I choose to start a family in my late 20s or right at 30-31 and i believe that's still young but really why is society making it sound like it's the end of the world if they dont have what everyone else has right away like a marriage and a family and they look at you like "oh no aww thats sad" look in public at work or in general. It's just rude how they make it sound like you're in a race.

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My friend is 24, 25 next year and she is divorcing cause her marriage failed. She married at 18. Im almost 24 and im not married and no kids yet and of course id love that but i don't wanna force it to happen right away either.
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The thing with me is im an average girl and even talking/approaching guys im not that good at. I get nervous and shy if he will like me or not but im trying to put myself out more and go to church and other events locally and try to meet guys. I know i have time i just get anxiety😢
Why is society age pressuring so much? Why do they think life stops at 25 or 30 when it doesn't?
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