It could be to reduce discrepancy (and the disappointment) between marketing and reality.

Reminds me of this monologue from the 1993 movie Falling Down [1]:

> See, this is what I'm talking about. Look at that. See what I mean? It's plump, juicy, three inches thick. Look at this sorry, miserable, squashed thing. Can anybody tell me what's wrong with this picture?

[1] https://www.youtube.com/watch?v=ciG8AKdp-GM