The literal meaning of "tied down" is something that is secured, with rope, chains, etc, to stop movement. In this figurative sense, "tied down" means that the child's needs will interfere with the person's freedom.
The literal meaning of "tied down" is something that is secured, with rope, chains, etc, to stop movement. In this figurative sense, "tied down" means that the child's needs will interfere with the person's freedom.