“Talk of the devil and he’s at your elbow.” This discourages talking about the devil…which is defeated by the popularity of the proverb.
Myths are exercises in power. The only question is, do they have power over you, or will you wield power over them?
“Bible” is a word that attempts to communicate authority–basically a way of padding your book’s resume. I prefer to trust non-Bibles.
Since Satan isn’t real, we’ve never much cared whether media depict him as “good” or “evil”; not like he’s going to mind. But that may change.