Because they cease to be a child. They become adults who can be held accountable for their actions.

I think it's fine to hold people accountable for their actions even when they are children. The issue is that you want to hold them 'accountable' for being born female. You might as well do that from birth.

Not that impressive, stormfag bots are everywhere.

Not sure why they don't bot me. I hate them at least as much as you do.