Because if people had no freedom of speech than the world would be opinion less, and this may be good in some ways like not having to listen to what someone has to say, but if we had no freedom of speech than we would not have been able to change the world like have. Just think about it like this, through freedom of speech, we have been able to make it to where that we don't have a bathroom for colored, and another for white people, and the fact that there is no black schools or white schools, it is all one, and we can give freedom of speech thanks for that. So being able to speak our mind has given us the ability to change the world for the better.