At one point you need to scale, and you realise you can just manipulate symbols easier. They might at one point have come from sincerity, but industrial scale trumples all.
Which is...the entire industry? I think this is a very simplistic view. Scale is pervasive in capitalism and not restricted to marketing. It is not being unimaginative, it is just a byproduct of the industry (isonomy and reproducibility over personalisation and personality).
https://en.wikipedia.org/wiki/Simulacra_and_Simulation