Nowhere in the world do we have absolute free speech. The Western World often approaches it through constitutional laws (Freedom of speech/expression/religion), but always has some restrictions on it as well. For example many countries in the Western World have laws against hate speech, racism, Holocaust denial, offending the monarch rulers, and even blasphemy.
A real safe space would be a space of absolute freedom of speech. A space where anything can be said without (the fear of) any repercussions. No matter what you say, in this space you cannot be physically harmed, or get fined or jailed, or lose your job, or anything.