Because it would be impossible for Google to do any kind of serious server side analysis of the data, which is why these companies use analytics, if Google don't have the data unencrypted.
October, 2018: "In Europe, Speech Is an Alienable Right: [the European Court of Human Rights] upheld an Austrian woman’s conviction for disparaging the Prophet Muhammad."
Precisely part of the problem is that most instances are in Europe, which means that much of the speech you can find online is illegal, and if you aren't Facebook you don't have the muscle to fight a politician or a judge who wants to make an example out of you.
The website is incredible. I spent a few minutes and I could not get to the end of it. I wonder how many copies of the software did that website sell - I'm thinking of buying one and I don't even own a Mac.