So, clearly the backstory of RDR2 is that you're an outlaw. That said, it appears from gameplay videos that there's plenty to do that's neutral and even honorable. But it's also apparent that there are plenty of options for outlaws who don't mind breaking the law and/or slaughtering people to get what they want.
So, is it possible to play RDR2 as a "good guy"? Sure, it may be necessary to hunt down bandits, shoot outlaws, etc. but it is possible to go through the entire story without doing anything like robbing or killing innocent/neutral NPCs?
(and yes, the distinction between the "good guy" and a "morally ambiguous protagonist" may be up for debate. But there are clearly games like GTA where it's easy to recognize you're the anti-hero. Is RDR2 one of those games?)