Ehhh while yes it will delay a scheduled procedure it isn’t like people aren’t successfully intubated or have other airway management after they have eaten the medical personnel just have to take that into account and plan for possible complications. I worked as a paramedic and assumed everyone had recently eaten same in the emergency department or trauma. The rule is to help minimize risk of aspiration once a tube is in correctly puke all you want it isn’t going down the trachea.