"But I didn't do anything!" - Falling to Evil without taking actions?

[Silly Name]

If you're Good, maybe. This is basically saying that you can't be both powerful and Neutral, which is untrue.

In D&D land, you're right, and I'll leave it at that. I should have worded it more clearly, but the point is that you can't be Good and let suffering happen while you're in a position to stop it.