This is like saying revealing that pornography is a studio act will turn away its viewers.

No, it's like saying that revealing pornography is a studio act will cause them to see how little it resembles a normal, pleasurable sex act, and that they may decide afterwards not to hold it up as a standard of comparison for their own sex lives. You've added the part about "turning away viewers." People know movies take a lot of production and love them for it. They don't judge themselves for not being able to fly, or outrun an explosion.