This goes back to what Thomas Sowell said about experts, they're experts in a specific thing, but often let that go to their heads and pose as experts on other things. Daniel Radcliffe is a mediocre actor who won the actor lottery at a young age and has managed to capitalize on it. Good for him. That doesn't make him an expert on anything else and while I respect his opinion, he's absolutely wrong. Kids need guidance and a safe environment to grow and fuck up. They don't need to be given agency at a young age to decide things that will impact the rest of their lives. That's what parents are for.