Without active interference, simply supporting a child's interests and making materials available is enough. My child wants to explore the environment around her. We aren't passive agents, either. I can demonstrate my own interests in front of my family. We can casually leave interesting books and materials around, or make gentle suggestions.
Interesting people come into our lives.
We can be patient and trust our child. Suppose I grant this argument. If this is true, I want them to have a memory of happiness and delight to cherish. A happy childhood might provide insurance against any spirit-killing future. But I don't grant the argument.