Some dreams are not to be done after some age. Young person can travel freely but when the baby arrives a couple is bounded to one place for several years. Enjoy your life till you can.
Not everyone has children, or wants them. Besides, who says you can't move with the children? My parents did - several times.
I didn't fly for the first time until I was over 35; I've now flown around 70 times. I know someone who became a techno party DJ in his early 40s (he's around 60 now, and still plays out occasionally). I was a property owner at 19, but a flatsharing tenant at 38 .
If you want to be stuck in the 1950s and live like your parents, then feel free, but life's not as straightforward and regimented as it used to be (and I'm glad it isn't).