I already saw that comment. Just like what the developer said, this idea you proposed is only applied to very specific NPC’s (And unfortunately, it only applies to Bella since she’s the only one that favors apples than anyone else), and adding more predators that favors apples wouldn’t change anything. In fact, it just makes Bella less unique than the other predators. If I were the developer of the game, I would say the exact same thing as well.
Plus, it’s locked behind enabling the Student Predator option, since without it, you can’t even hide in any other NPC’s belly (And the majority of NPC’s are students that cannot devour without the Student Predator option).
And even if it were the case of hiding one’s belly, digestion will still take place (Or the predator simply doesn’t let you out), making it feel like you’re willingly getting yourself digested more than hiding from an Apex Predator. There’s no non-digestion for the sake of hiding one’s stomach, unless specified by the developer themselves.
The only time where Apples are useful is if you were eaten with an apple in hand (Or in a case of Bella, giving you a chance of escape by taking the apple on your hand instead), and using apples to hide in someone else means you’re having less chances of escaping the Apex Predator.