Most adults are terrible at answering 'what if' and 'why' questions. An AI assistant with search will do much better than the average parent

That might not apply to the kinds of parents that hang out here though

Also it's better not to answer, but flip the question back and let your kid think through it, offer hypothesis, and so on, helping him problem solve, recall, and all that.

Except for the... you know... human interaction part. Arguably the most important part.