Images on cigarette packages are of real patient and real impact and still smokers ignore it. A fake, stylized hypothetical image will have much lower impact.
Are you saying that fake, stylized hypothetical image will have much lower impact reducing the impact of all the fake, stylized hypothetical images in Facebook?
Maybe they should insert disgusting slices of actual carcinogenic lung tissue into boxes of cigarettes, since images of them aren't impactful enough.
That would be harder for smokers to ignore, and it would make the cigarettes harder to light, worse smelling and tasting.