Yes. An aura. Which is a game term.
Which I can understand when it's an aura of fire, which, by the way, is present in 5e as well : "Fire Aura. At the start of each of the balor’s turns, each creature within 5 feet of it takes 10 (3d6) fire damage, and flammable objects in the aura that aren’t being worn or carried ignite. A creature that touches the balor or hits it with a melee attack while within 5 feet of it takes 10 (3d6) fire damage."
It's visual, understandable, not abused since this is really a boss type, and which you can protect against.
Now, personally, the notion of an aura of "hunger" on minions - and one that you cannot see, foresee, mitigate, etc. escapes me entirely.
And my problem is that it's the same with a huge majority of 4e game constructs. It's obvious, and has been noted by a number of people here, that these are purely gaming constructs. They are not there to make sense in the fiction. They are there because they make the game technically more complex, and the explanation (if any, usually there is none) is strapped on as an afterthought.
For the Balor, it's completely the other way around. It's on flame, cool, so that flame should be doing fire damage. Logical, the PCs can see it, and can do something about it.
For instance, in 5e, you have Cloud of Daggers.
Which is a spell, visible, explainable, etc. And one that you can protect against since it's slashing damage.
4e D&D combat is wildly different from Torchbearer Kill Conflicts or Dogs in the VIneyard "Escalate to Guns" Conflicts.
Yes, it is.
There are all kinds of ways to skin a TTRPG cat. But every_single_one of them relies upon obviously game constructs meant to facilitate play of a game.
And this is where philosophies diverge. the 4e constructs are meant to facilitate the technical play of the game. In most other TTRPGs, they are meant to facilitate the narration of the game.
And, back to minions, it's exactly that. There is no in universe logic to it, just a technical explanation that makes them easier to manage for the DM.
It becomes especially problematic when they forgive their favored systems of the same "indiscretions" that they hold other systems to account for.
It's not a question of "forgiveness". I agree, no system is totally exempt, but few systems are as full of it as 4e is. It's a question of degree.