Except that having a child is a readily achievable goal that anyone can reach at any time they choose to. The decision to have a child, whether at a younger or older age, is almost entirely up to the two consenting adults.
Hoping to strike it rich before the age of 45 is pretty much the complete opposite.
Men can easily have childrens on their 40s (not recommended though, it's hard work) but women cannot. It's sad to see that most intelligent, talented woman fall in the trap of their careers and die childless. If you are an intelligent entrepeneur woman in their 20's, do yourself a favor, stop to have some childrens and then resume your career.
How can you know about the tradeoff? you remember your past lifes? nobody can, you will have to guess and often you will guess wrong. That's why very few people has great family planning skills at their 20's.
Female fertility starts declining from about 24 and starts dropping like a rock from about 35. Men have less to worry about but there are still declines.
Hoping to strike it rich before the age of 45 is pretty much the complete opposite.