Oh I agree with you here. It should be on the box. But, on Destiny's box it says that it is a game with 'rich cinematic storytelling' which is an outright lie. You need a road map, a compass, a ruler and an outside source (a website to read cards with information/lore that should be told *in game*)to even try to make sense of this story and you can't really because there is no story to speak of.
And it's because I feel the company lied (and it is not the first) that I would rather scour the internet to get as much info as I can before buying the game. And even then it's a crap shoot. :/ You are so right, it is sad. :(