Sometimes they do. I don't know how to tell the difference between “child's desires are being listened to” and “people are speaking for the child” other than talking to them – and often, children don't feel comfortable speaking their minds even when they're assured it's safe to do so, so it's hard for me to tell even then. (Ymmv: I imagine skilled practitioners of social-fu can tell the difference.)
But just because adults are saying that a child wants something, that doesn't mean the child doesn't want that thing.
But just because adults are saying that a child wants something, that doesn't mean the child doesn't want that thing.