The Hag is part of nature. She is part of the Dark Feywild. Yes, she is a predator, and predators seek prey, always. They seek the weakest in the specifies to prey on always, like all predators do. That prey just happens to be us so we label it evil.
Yet if you are strong, wise, and diplomatic you can coexist with the Hag just fine. The Gur do it because they pass around the wisdom of such things. The Gur are not evil.
The hag clearly isn't part of the nature, she is evil twisted creature, interfering in natural cycles. This kind of hag doesn't protect the forest, but only deform it to her perverted desires. Additionally when role playing a ranger it's clearly pointed out in the dialog option that she must die because of her unnatural and destructive actions
Found an interesting story in
https://forgottenrealms.fandom.com/wiki/Green_hag :
There was known to be a unique creation myth in regards to the green hags, one that stood out given that it was told by dozens of races with little change. Most commonly referred to as Green Mary, but known by elves as Kiersana the Unfaithful and to orcs as Grigga Toegnawer, her story sent shivers down the spines of the children of all races. Once upon a time, there was a beautiful druid of the woodlands known as Green Mary who protected the hundreds of miles of wilderness that was her domain. She dwelt in the heart of the forest worshiping nature spirits and upholding their ancient laws in a symbiotic relationship of servitude and protection with the wildlife, until one day a powerful hunter arrived. He chopped down trees to make weapons in order to hunt the animals for sport, and the whispers of the forest sought vengeance against him for his recklessness, yet both Mary and the hunter became enraptured by each other's beauty, leading her to disobey its commands.
The following morning, Mary awoke to find that as punishment, the forest had warped her form into something more resembling the forest she was meant to be protecting, leading her to fearfully and repentantly slay her horrified lover, leaving not even a drop of his blood to stain the earth. Yet despite her penance, nature showed its merciless side to Mary and left her in her disfigured and self-loathing state, leading her to flee into the most fetid fen of the forest in misery. Thus, Green Mary became the first green hag, a creature that lusted after humanoids while craving their destruction and whose dalliances with the civilized world at the protest of nature made her a pariah of the latter and the archenemy of the former.
Funny thing is, from a constructivist perspective, the hags are either the romanticized ancient druids or the representatives of animism. And here it is, this story of Green Mary, reinforcing the conclusion of the observation via this mentioned perspective.
Meanwhile, the scripted dialogue option you mentioned is, if not an early access bug, a sole construction among the DnD settings. Does it make sense? Yes. Was it a sufficient testimony to make the final judgement? Not necessarily be.
