It doesn't, hiding something and offering a clear option to reveal it which acts as a caution/warning and completely removing something are two entirely different things. Also, Steem is not Steemit, no one has been censored on steem and for that to happen, for someone to have their content removed requires that 17 out of the top 20 witnesses do so.
The irony is that 'this content' which you claim is censored, is presented unchanged in it's original form and you are responding to it, in essence how can something be censored and you can see it in its entirety, unedited and completely original, and respond to it?
Clearly your interpretation of censoring is rating things as hidden, which anyone who understands what freedom of expression is, recognizes that rating things is a form of expression itself while whatever was rated as hidden, since it is still available in the exact same place where it was first published and is otherwise completely intact, only predicated with a caution that it's rated as negative, it does not infringe on that author's freedom of expression.