I’m strongly opposed to controlling minors too. 18 is an arbitrary age to suddenly give people autonomy.
Children are emotional creatures without fully developed brains. They cannot process the long term ramifications of their actions because that part of their brain literally hasn’t finished developing yet. Sometimes you need to make children do things. If they won’t put the bleach bottle down that they pulled out from under the sink, you need to make them do it, no matter how badly they want to drink the bleach.