@Merilirem It's wrong to say they ALL do it. There have been plenty of groups of brigands and such who live in the mountains or wherever who basically protect the people in their territory in exchange for supplies, avoiding plunder and rape for long-term benefits. They're even known for temporarily allying with the government to help repel invaders in exchange for immunity from persecution, temporarily or permanently, parallelling the whole "privateer" thing that happened on the seas. There's plenty of people who'd join these groups because they stole, deserted, or did some other crime which doesn't really put them at the level of being a rapist. It's a thing that happened in many places and eras, and still probably happens in some of the shittier parts of the world.
Mercenaries like this, marauding civilizations like vikings, and even "proper" soldiers did a whole lot more raping than bandits, because they were protected by the law: it was considered beneficial to an invading force to rape and plunder the people in the places you invaded for a number of reasons, so it was allowed. Bandits, though? They often became that out of fear, poverty, rebellion, etc. and could only raise so much fuss before the nobility in charge decided they were worth doing something about.
And even besides all that, rape is a powerful enough sight that implying it instead of showing it outright is pretty much always acceptable unless you want to make a whole thing out of it. It kinda derails/disrupts the narrative to put it in a story you don't trust to properly deal with the subject, now that we live in an era where most people get what it does to a person.
People getting taken away in the first place is what never should have happened tbh, because of what a shitty contrivance of a plot device it is in this particular case.