Let’s say your child wants to be an actor. One way to make this happen is to be a successful actor yourself - require your children to be cast in the film in return for you starring. This is how famous acting families pushed their kids forwards, including Nicholas Cage (Coppola) and Jeff Bridges.
More relevant for HN is rich people. So you are tech rich and your kid wants to act. Fund the movie on the condition your child acts in it. That is the way since movies began.
On top of that come the contacts and being rich. But the contacts are not a thing other people couldn't make as well, especially if they are good. One of the somewhat hidden benefits of higher education are the contacts you will make. Maybe you're not rich and your parents are roofers while you want to become an actor, but if you're good and well connected you might benefit from other peoples connections. This is how I started to make my living in a foreign country with two parents without any shared background: There were people who had those contacts and I benefitted of them simply by being the one they chose because I am accurate, reliable, on time, knowledgeable, patient and good at what I do.
But