Dissent is indeed important - and so is the right to compose your thoughts and make non-public comments which are not perfectly formed. Time and again we've all argued with others over something which was a not-well-thought-out comment imperfectly formed & delivered. So long as there is a line delineating "something to hide" and "dissent" and "libel" and etc, we need a right to form & craft our words through imperfect expressions thereof until we form something we can take public with confidence. Sometimes ideas just sound bad at first glance, and require polishing & presentation before the positive value therein can be present and not inspire visceral reprisal.