I would suggest parent should not force child to go to a boarding school. If they do so then they should also be ready to go to an old age home to stay till death. It’s bitter truth. As per law of Karma whatever we do it comes in return in the same life.
During the tender age child need more association of parents they feel very safe in their surrounding. Please don’t spoil the children life by sending them in boarding school.
If you are sending child in Vedic Gurukul for getting to know the higher purpose of life then I would recommend, also this should be done in agreement with child.