Never heard that about early builds, which makes me think it's perhaps not verified.

I took it as the railroading matching up with Walker's feelings of having only one choice. It doesn't make sense to continue, but you feel forced to anyway - very much like him. What makes it more convincing, to me, is that there are hundreds of other action games that don't give you a non-action, non-killing choice - and no one has those same criticisms of those games.

I respect Undertale, I guess I never felt much admiration for its peaceful methods because it's such a direct translation of their combat mechanics, when making peace with people is rarely so simple.