Disclaimer: I am a happy paid Kagi subscriber and absolutely am an advocate of their product. I really hope the company makes it work financially because we NEED something like it.
I have two young kids of my own (4, almost 2) and have so far been able to avoid the issues of letting them free roam on the net, but it's obviously something that's coming. This was not something I ever paid attention to in my youth but now as a parent the open internet completely terrifies me. And I say that as a core millennial that basically grew up with the internet.
The current status quo of "kids friendly" content (eg YouTube Kids) is mostly awful. I would still never let my young kids browse something like that without supervision.
I am appreciative that Kagi knows this is an issue and is investing into the area.