Originally Posted by
Stingray1
With the unlimited supply of stomacemptia.
That is only the case in mid game, and characters without Herbalism will either be stuck with cursed stomacemptia (a rather extreme solution), or spend uncursing supplies on it (less extreme but more resource intensive). Good, tough choices for a character to make, and that's good gameplay in my opinion, but an early game character has none of those choices.
For an early game character concerned about starving to death, it is more effective to eat until bloated, if by doing so you can avoid carrying those food items with you, therefore lowering your burden levels, therefore making the food last longer.
Vomiting certainly isn't a necessary addition for gameplay balance or anything, but it makes good sense that any adventurer who regularly eats strange corpses, potentially deadly, would be standing by with a finger ready to stick down his/her own throat.
...and that would have the added benefit of allowing those newbies (myself among them) the "good gameplay" tough choice of vomiting up that precious, precious food in his tummy, or giving that precious, precious strength-increasing ogre corpse the opportunity to rot away before it can be eaten.