Marketing is supposed to reveal information about your product, not obfuscate it.
It really isn't
supposed to reveal information. It
can reveal some new information, which surely could empower it's actual purpose, which is to obtain public interest and hopefully intent to buy said product. Though there is no rule or requirement for marketing to have to / suppose to reveal something new any time marketing takes place. Neither does showing more of what the viewer already know obfuscate anything.
Have you ever watched a movie trailer? If it reveals too much, isn't it then a bad trailer for basically showing you the movie beforehand? No, the trailer is to build up hype and interest. And often just simply to let potential audiences know that it's coming soon™.
