Yes, the deep experienced wisdom of 8 year olds is often underrated and frequently confused with "ignorance" and "naivety"
Not sure I get your point. What if the conversation was along the lines of, "Isn't it wrong to take off your clothes in public?" In cases like that, I'd take the wisdom of an 8-year-old over the "experience" of many adults any day. The very young can have a straightforwardness and eye for truth on moral issues. They are, as Dickens put it, "fresh from God."
Or, maybe what happened is an 8-year-old cousin (on a different tear!) had said to her, "When I grow up, I want to take off my clothes for money, just like you." That would be an "Uh-oh!" moment for a Christian model, wouldn't it? In either case, I wouldn't discount the source for being 8. Their lack of worldly pretension actually gives them more credibility than adults on certain issues.
Well, I thought it was pretty plain, and if you didn't get it, then I really don't think any further explanation on my part will help. Think about it for a bit, and I'll give you this hint. When was the last time you asked an 8 year old for advice?