Huh, okay. Good on you for being consistent.
I find the banning of individual users to be highly necessary, to prevent spam of porn/nazi shit/general assholery. Instead of everyone having to spend a long time forming their own blocklist, they can sign up for an instance with a mod team that they trust to do it for them. Defederation is a useful tool towards that end, because (for example) Exploding Heads is an instance that explicitly allows racism and such, so a well-moderated instance will defederate with them rather than having to ban hundreds or thousands of individual trolls who sign up over there because they like racism.
Wars tend to involve civilians getting hurt, because yeah, it’s cheaper and easier to disregard international law.
I wouldn’t generalize that to evil always winning vs good, though. Human life is complicated, and mean, but progress gets made anyway. There’s a reason most people dislike war.