When people say how its dangerous to voice opinions nowadays, they aren't using medieval Europe as a reference point (where it was also very dangerous to voice unpopular opinions). The reference point people use is their own experiences online from ~10 years ago.
People used to be able to say whatever they wanted online, and now doing so is dangerous. You may think that is a good thing, but it is still unequivocally true that voicing unpopular opinions online is more dangerous than it used to be.
Making some snide remark about history is completely missing the point.