Your understanding of censorship is fundamentally distinct from that of the Brazilian constitution (BC) because you clearly detach freedom from legal responsibility. In BC, freedom of speech is bounded by the law. That's why you can't (e.g.) say you're going to harm someone without facing the legal consequences.That's also why you can't use words to incite a (virtual or real) crowd in which you're influential to take illegal action against someone (and one can do that without being explicit). Thus, in BC, censorship is what happens if you prevent someone from speaking something they are legally entitled to. In stark contrast, your examples were basically of how speech could be used to bypass law limitations (e.g. abuse of economic power is a well-defined example of illegal activity).

The difficulty in seeing "where is it in the constitution" is likely related to viewing Law texts as a kind of source-code in which everything must be carefully defined and every possibility must be explicitly stated. No constitution work that way. No one could. It may contain some very specific rules, but in general it is an articulation of principles that must be observed by legislators while formulating laws. One of such principles is that our freedoms cannot be detached from our responsibility (i.e. the possibility of being held responsible). Law works that way because one can't predict in advance every kind of situation.

For instance, if I ask you whether you agree that right to life is a fundamental value, you would probably say yes. I assume the same goes for freedom of religion. But what would you say of a father that refuses to do blood transfusion in his newborn son for religious reasons, thus leading to its death? As responsible for the newborn, is he entitled to act this way? Which value should prevail? Freedom of the father to act according to one's religion or the right of the newborn to life? Distinct communities can give distinct answers (e.g. ancient Japanese would perhaps pick honor over life). The point is not whether there's a clear answer or not. The point is that you can't expect to find an "if-then" statement explicit about it in the Constitution or even in laws in general, and that you can't expect that whatever works in this specific situation is fully generalizable to every other situation in which these two values conflict. Applying the law requires interpretation of both the text and the situation in question, and there's a whole discipline dedicated to how that's done (hermeneutics).

The same goes for values such as freedom of speech. Given its intrinsic connection to responsibility, its application is always bounded by the law, and the application of the law is always bounded by the specific situation at stake. That's why we can and should tolerate people believing weird things that go against our best scientific knowledge (juridically, no one cares if you believe that the earth is flat), because we can easily keep them under check using arguments, rational discourse, etc. However, if it becomes part of something illegal like attributing a crime to someone else without evidence (e.g you're using your influence over flat-earthers and their typical suspicion of NASA, to make them believe that the NASA is supporting your political adversary in an attempt to fraud the elections), you must and will be held accountable, (that why it's not really about "judges deciding what's fake"; rather, it is about how one is (ab)using a given discourse.