Each rabbit is different, but we all have to take precautions. Something that's done with "good intentions" such as feeding a baby bunny a carrot, can prove to be fatal. Or, the rabbit can be completely fine and beg for more.
Rabbits in the wild know how to protect themselves, which foods they should and can't eat, and how to avoid being eaten.
Our rabbits are not wild. They are domestic. Sure, a baby bunny can eat a carrot in the wild and be completely fine. A wild baby bunny could also have a heart attack and die in your arms if you try to pick it up.
Over the years of domesticating rabbits, breeders have fed what's easiest to get and the cheapest. It's much cheaper to buy a bag of food, than a dozen carrots, per day, per rabbit from the supermarket.
As the rabbits ate less and less of what they would find in the wild, their digestive systems were trained to accept what they were being fed now, and shifted from the farmer's garden to a balanced diet of pellets, water and hay.
Of course, there are breeders that feed baby bunnies banana, carrots, apples, ect. and they never show signs of being sick. However, they probably have been doing that for many years and know what to do if a baby were to show signs of being sick from the fruits or veggies.
Holland Lops, as a breed and as individual rabbits, have never seen the "wild". They've never tasted "freedom". And they don't even care. Without humans, they are lonely, sad and depressed. The breed was developed to be just the way it is. Constantly seeking attention, Hollands thrive in human interaction and make wonderful pets.
Holland Lops could never, ever, survive in the wild. No breed that was developed in a rabbitry could. Letting your rabbit go because it would have a "better life" in the wild than in a shelter is sentencing it to a quick death, either by eating something poisonous, not being able to find its own food or water, or being eaten itself.
Even though they are so delicate, you don't have to worry about your rabbit accidentally eating a leaf as a baby. If they show any signs of pain after being monitored for a couple hours, or they have a difference of droppings (smaller, bigger, runny), take them to an emergency "exotic" pet vet.