I don't think you quite understand the intent of Steemit. Also, they reserve the right to terminate your account to establish some amount of control. They would have to update the policy constantly of they didn't state "any reason" because new reasons that no one thought of will continue to come about.
Is this not about giving people complete freedom over what they say and do without others lording over them? Maybe I don't understand yet, like i say, I'm new.