You could bet I'd have a secret phone, and somehow knowledge on every wifi password in the neighborhood.
The effects of things like gore at 13 are not well understood, I think, but content like this is prevalent, so I see the point in either restricting or allowing it. The definition of "fine" also varies, what's fine for some, is certainly not fine for the other. Also, simply surviving, or turning out to be a degree of fine might not be something that parents want for their children. For example, people overcome trauma all the time, and doing so is great achievement and a source of life satisfaction, but we generally don't cause trauma to achieve this outcome, in fact, most of the time we actively prevent it.
At the end of the day, I think it's mostly just risk, and dealing with it is risk management. It's not that there are any clear paths, many excellent people and outstanding contributions come from unlikely circumstances, and many times even the safest bet fails.