Two things:

1) I'd love to see the correlation between age/experience and success in parenting too. I suspect there would be a similar finding, that the more experience you have, the more knowledge, insights, resilience, adaptability, and decision-making frameworks you can proactively leverage to your child's benefit.

2) Regarding entrepreneurship, experience brings so much to the equation, but it also eliminates so much too. Does knowing what you don't want, didn't like, and can't do contribute to the correlation between age and success too?