Maybe it was just because I was a precocious reader at 8-12, but at that age almost none of the "age-appropriate" books in my school library actually interested me. You start to think about difficult "adult" subjects like relationships, mortality, conflict etc, yet no material available to you really addresses these ideas in a way that doesn't feel like they're just completely coddling you from reality. I had to go to the public library to find actual novels I felt were at my maturity level. You had 8 year olds using racial slurs against each other playing call of duty and you're worried they're scarred for life reading "fuck" in a novel? Come on children aren't idiots, expect more from them.