Honestly, this topic is difficult for me to take an extreme stand on. I'm not even sure how to start to explain my opinion. I will say that I don't appreciate the "you're too young to come out" argument on a personal level (my dad uses it with me and I'm in high school). Sexuality develops around the age of three (I'll cite my source as a reply), so it does make sense to give children credit of being aware of their own sexuality. But does this mean they should come out? Here's the difficult part. As a child, they are still learning new things about themselves, including their orientation. And what they know can definitely change over the course of their life. Coming out is a huge thing. For some, coming out can change how others perceive you, for the good or bad.
Another factor to consider is that not every child is the same. Some children are very self aware while others not so much. I'll use me as an example. I didn't gain a sense of awareness for my orientation until later in middle school. For a good amount of my life, I actually thought that people ONLY have sex with those they deeply cared about and that outside of that sex was just a big joke to laugh at.
There's more to unravel, but here's my input ig.