Grown adults often become tongue-tied, when asked to describe how they hear the world, and how their environment could better facilitate their hearing needs.
Single-sided deaf and partially deaf children, who have never known anything different, have no hope of adequately raising awareness.
But this is precisely the moment when such knowledge would be most helpful. Young peers get to learn about deafness; supervisors know to watch out, on health and safety grounds, where sounds are involved; and your hard of hearing little one gets to be included in all that's going on.
The alternative is a crash course in discovering that social exclusion comes as standard, when no-one knows how to create a deaf friendly environment for you.