You're right. Parents can google it and explain it to their kid. Parents can find the answer in an encyclopedia, find a book about it, or find a youtube video for them. There are lots of options. I hope we didn't offend you.
As parents ourselves, we think it's helpful for kids to have independent access to the world's knowledge. We've found it helps them feel they can learn as far as their curiosity takes them instead of waiting for library day or waiting for us to look things up for them. Statistics show that most parents just end up letting their kids use Google independently, which has led to half of children today stumbling on adult images and videos by 12. For some reason, I don't see a lot of people criticizing that. Perhaps, because they don't market to kids. Kids just use it. That's probably what will happen with AI tools that don't specifically market to kids. They will have adult content, kids will get exposed, but they won't be blamed because they didn't market to kids.
We understand all parents have different opinions on these things. We basically just built the tool we want for our kids, and we want to give interested parents an extra option if they want it. One where it is impossible to find adult images, video, links, or advertisements.