I mean, what about if you want to play an evil character? Being "evil" in many rpg videogames is being a psychopath that kills because they enjoy it, steals when there's no need, and in general does evil for the sake of it. Instead of you making "bad roleplaying choices", it's the game forcing its view of the alignment on you.

I'm all for a more grey moral system where you can be evil because you do something for personal gain that happens to fuck up a lot of people, or something like that. Not having that is actually the reason I rarely play evil characters in games.