Lot of incorrect assumptions here about my thought process so here's what it was; she is a kid being used as a political mouthpiece. I do not believe such children, whether used for right wing talking points like this one or left wing talking points like feminism or the LGBTQWERTY agenda, are actually that thoughtful about the issues they are talking about.
They are held up not because they actually have comprehensive insight but because there is an emotional appeal to seeing a child making this or that political argument. So sure, I prejudged her as not a genuine advocate of what she's espousing but rather a child who was coached to regurgitate political talking points. Don't be surprised if people aren't so easily impressed by this kind of propaganda.
Usually leftists are more often guilty of this kind of thing because kids represent "progress" to them while conservatives are more likely to use the elderly who represent "tradition". But this thread shows that right wingers will nonetheless eat this kind of propaganda up if its convenient for them.