For resource limited platform selecting their focus is just right. It would be like running food bank in some extremely rich neighbourhood. And people living there complaining of not getting caviar and Japanese wagyu...
E.g. as a European my idea of freedom of speech is not limited to the things I am allowed to say, but also about whether spaces exist in which I can say them. US style freedom of speech, doesn't produce any more insightful or free discourse than over here. In fact I'd argue it produces a discourse where voices win that are the loudest, most outrageous and least respectful, while voices that are more reasonable are frightened away.
It is the same thing that happens if a state gives up her monopoly of violence: The strongest dominate, while the weaker, more peaceful ones suffer.
Freedom is not just the freedom to do X, it is also the freedom of not having X done to you, as well as the freedom of living in a space where doing X is actually possible.
This means a free society does not have to endure all voices, especially those that aim at harming others or have the goal of using freedom of speech to get rid of the free society. Don't like the rules of a free society? Then you don't get to easily claim the protections granted by one. You can't whine to the referee if your goal is to get rid of the referee — I mean you could, but that would be pathetic.
We delegate these rules to governments to secure the individuals rights to life, liberty, and happiness (as your declaration of independence so wonderfully puts), not because we want to allow shitheads to allow to shittalk. This is just a side-effect we all have to endure, because we don't want governments to police all speech.
That means also in the US not everything you could say goes unpunished by the government, especially if you're not white, male and christian. Remember, the police is part of the government and if they can shoot you because they thought they have seen a gun, they can also shoot you because of what you said.
On top of that we, collectively, form governments for (among others) the purpose of protecting each others speech, not just from governments, but from each other, from our bosses, coorporations, from the police. That means, we collectively, use the government as a governing body tho whom we delegated certain powers. Where to draw the line is different in different regions of the earth. For example the female nipple printed in many European newspapers would not be protected speech in the US for puritan religious reasons.
I don't have to let you in, feed you and offer you a bed for the night. You can be free out there.