Because....food does heal people? Like.... If you're hurt you recover faster if you eat lol. Obviously a pizza won't close that open wound on your arm from a goblin arrow but you get the idea :P
Naah if I wake up in hospital after car accident... my first comments: Me: Nurse get me food! Nurse: You will get food soon not yet do you want water? Me: Naah lots of food and I can rise from this hospital bed today! Nurse: What?! Me: I know you see I have played Baldurs Gate 3 .