This is very true. However, if you've never heard of Steemit before, and if you've never heard of cryptocurrencies or blockchains... And you suddenly see someone tweeting about "this cool place where you will earn thousands of dollars" you'll definitely join and expect "the world". Especially if you also see a screenshot of thousands dollars in rewards.
So the false advertising (or the inaccurate) is actually what makes people expect as much as they expect. Which is why I want these campaigns to reduce the promises of rainbows and unicorns, because Steemit is not that easy.