Voat is proof that we are not yet deserving of free speech.
I find beauty in the principle of FoS: we would never have e.g. legalized same-sex marriages without it - and this is why we need it for future ethical advancements, possibly (as one hypothetical example), the right to die/destiny. Advancement of the moral zeitgeist is impossible without it.
The utter impossibility of it in practice is unavoidable. There are few more willing to violate the rights of others than those who demand the right to speech.