They've got to start some time.
Sometimes in the name of "correctness", we overlook the obvious.
Children are our future, not just in hunting, but in all facets of life.
The need to be mentored, as mentors, we need to respect their age, and their passions for the things we do.
Each child is different, in maturity levels, the ability to reason, and to understand what we are trying to teach them.
It is up to the mentor, to evaluate each child, and make a decision based on that evaluation.
I went afield at a very young age with my grandfather and uncles, and my sons and grandsons have gone with me, and their grandparents at a very young age. I was comfortable with it and so were they, as were their parents (my grand children).
Don't be too quick to jump to conclusions in either direction, you might be surprised.
Just my .02.