And people would complain that they can't tell if the CGI is any good and that it's a fishy marketing ploy to gloss over shitty photography, editing and/or acting. And it's not how you'd sell Guardians of the Galaxy 2 and Star Wars 8.
They still kinda do that though. Talking about Guardians of the Galaxy, that's what they did, only they used a character's remarks on how they were just a bunch of jackasses.