Decided to peak reddit questions (I know my mistake)
Why people always ask this garbage question? Do they know that the Lich ritual involves the sacrifice of a innocent life?
Liches can be any alignment. Per the 2e ruleset, at least.
In rare cases, liches of a most unusual nature can be found which are of any alignment.
Liches are basically turbo-autists who are beyond good and evil. They just care about their
to-scale miniature model train sets magical research. However, they don't care about human life, so they're usually seen as evil based on their actions.
Though, yes, it requires a lot of humanoid blood to be shed. Including a virgin and some infants. Maybe they could have used orcs?
My main issue with this argument, which is to say Takamori's, not yours, is that "you do mean things" is not the definition of "evil" in these games usually. Sure they may say, "Evil is being selfish", but that's in the eye of the beholder despite the core conceit of the alignment system being black & white morality.
Is a lich who ascends by sacrificing only evil aligned people still evil? Golarion's lore is so retarded the proper answer would be, "Yes" but only because they replaced Sigil with the Boneyard and the Ao with Pharasma who hates Undead. But in terms of just pure alignment faggotry, I think it's heavily up for debate. And I know Owlcat tends to lean in the direction of providing different paths even if it isn't supported by the idiots who wrote the Pathfinder setting.