Chiming in on your update. It's my understanding as well that it's only related to distribution of content. There's nothing keeping you from storing misinformation on your personal Drive, but if you're linking to it from Facebook and using it to, say, sway a political election, cutting off others' access to it makes some sense.
Favorite quote, about 9m in: "I had a group of folks in my office not too long ago [...] house members, democrats and republicans [...] walk over [to my moon rock] and said 'this is actually a moon rock?' ... "and I jokingly said, you ain't seen nothing yet, wait 'til you see what comes home from Mars"