The process of making risotto is a slow dance between the rice and the liquid, where the heat gradually draws out the starch and invites the flavors to meld. When we add wine, we are adding a layer of acidity and history to the dish, but it is a mistake to think the fire entirely consumes the alcohol.
A small part of that essence lingers, though in such a minute quantity that it rarely concerns the young ones at the table. It is like the way a song stays in the air after the music stops; the influence is there, but the weight is gone. For a family meal, it is perfectly safe and brings a depth that broth alone cannot provide.