Historical Chinese culture and many other cultures bound children to marriage partners at a young age. Life was short, brutal, and cruel.
Yes. Child marriage used to happen in the past. But we have long moved past that stage. It is called "progress". But there are certain groups of brainwashed people, who want to abandon this progress and go back to the stone age. I don't have a problem with it. They can do whatever they want. But I'll be having an issue if they force others to do so.
But they shouldn't get to pick and choose what they go retro on. If they want to pork the kiddies, how about no mobile phones, no internet, no cars. Camels only.