I find that hard to believe that in 8U-10U there are 7-9 hours of practice and individual instruction for every hour of game time. Typically in 8U-10U 90% of the development is in a team setting. That is unless you play for the DFP Super Elite Platinum All Star 8U team who practice several hours every day in Ray Ray's pole barn or those that play PGF in California.
Speaking only for my DD...At the 8U and early 10U age, a majority of my DD's fundamental skill development came from our work outside of team practices. From what I saw, all of the better players in the league at that age were players who were doing the extra work.
I recall a time when I was approached by a dad of one of my DD's teammates (10U rec), and was asked how my DD got to be as good as she was. I explained that we did a lot of work on our own including hitting, catcher-specific work, and simply playing catch out on the street in front of our house. The dad looked at me like I was crazy.