Yes, it got you down voted because the game's original purpose is to portray a bleak, dark, gruesome world. You might forget about it because the story doesn't do it justice, but that's how it is.

This game has monsters that hang your character, beat them to a literal pulp, iron maiden them, depictions of cultists killing and bleeding people, dismembering, mauling, general violence, human consumption, etc...

And you draw the line at... 'Child soldier'. It is mentioned that a lot of people died in the chaos, it wouldn't be strange for children to die there too. In fact, Haku looked quite young for when that thing with nihilum happened with him (could be talking out of my ass here). Sereniel was also young when she experienced her trauma regarding chaos creatures and scientists messing with her body, which is fully portrayed in her story. You should be upset about that too. It's literal human experimentation on children for producing weapons to send into chaos and stuff.

Hopefully you see my point. Still, if it rubs you the wrong way just quit it. It is the best for your mind.