In a cold winter day if you send your child without a proper clothing that would keep them warm, you are the one to blame for their sickness. Understanding reality of our world and history is important.
There are few attacks on children. some are:
When the state tells minors that they are not a subject for sexual interest till the age of 18 then they will not be able to understand the danger or risks of their surronding and their actions. They try to fix it by sexual education that some suggest start at kindergarten.
Through history in every culture people after puberty age have been part of marriages which was the only way to have a sexual relationship before it became normal to have sex without shame at school age with people at the same age.
Neither Quran nor Sunnah set age limits. However in Islam marriage is the proper way for sexual relation. Marriage supposed to happen publicly with consent from the guardian even if they are adults according to most Islamic scholars.
Marriage has obligation and in now way allows harm to be imposed on the female. contemporary system is shifting responsibility from family to the state which is failing to protect children on massive scale.
What is called now child or teen marriage was normal and very acceptable. Check what laws and religion have said about Young age marriages