As someone who repeatedly watched fellow Hunter Ed. Instructors speak out against this, I will weigh in.
The argument has always been that 10Yr-olds don't have the attention, physical ability, comprehension,or whatever and therefore shouldn't be allowed. The problem has been, up until now, that thestate has tried to intimidate the public into thinking that under 12 couldn't even handle a firearm. I have contended for many years now, thatonly applied to hunting and NOT target practice.
With this new law, we now have clarification that individuals of ANY AGE can indeed be taught about firearms and how to properly use them. In addition, the way "range" is defined, those with larger tracts of property can have a "range" right in their back yard. So now we (parents) can start teaching children at sixor seven about firearms.
By the time the child is ten, he or she should have logged hundreds of hours with various firearms. Hunter safety will be easier to teach (hopefully) because we shouldn't have so many awe struck students and gun safety should actually increase.
Just my $ .02 from somebody who lives it every day.