I get your point, but, unfortunately, I think the vast majority of children would only vote the way their parent's are voting. When you're literally dependent on someone else to feed you, cloth you, and provide a shelter over your head - you don't have a whole lot of options to go against your parent's wishes. Add in that most kids are equally as uninformed, or drink knowledge from some of the most brainrot cesspools of the internet, and you're not really getting the most informed voter on the other side.
I want to believe that a child voter would dramatically change the political landscape for better, but I'm far too jaded and cynical after seeing this current circus to believe it.