Hey there!
It is very important that a child or young person make their decisions.
It can be important for a child/young person to make their own decisions (for some things) because if they don't, they will grow up thinking other people can just make their decisions for them. Also, it depends on what decision the child is making. If a child is deciding whether or not they will do outdoor activities, then that should be up to the parents since the child can get hurt. Some kids don't know whether something is dangerous to do or not.
If a child is deciding what their favorite color is or what they like to do in their spare time, that is a good example of what they should be deciding on their own.
Hope this helps you.
Have a great day!