This misunderstands the way technology, social media in particular, have exacerbated problems with misinformation. No one is claiming the media was perfect before. Obviously hoaxes and false rumors have always been a thing. But social media has made disinformation scalable.
For as long as I can remember, National Enquirer and other magazines like that adorned the racks of every grocery store and book store I've ever been to. Yellow journalism was coined as a term over 100 years ago. There's nothing new about "fake news". And it has been scalable since the invention of the printing press.
No one believed bat boy and even the plausible stuff in those was never the subject of design making. The National Enquirer is as much News as the Onion is.
The tragedy now is that there are sites that aren't neatly packaged as entirely false but are. The Internet has empowered people like Alex Jones and other people spouting pure falsehoods.
Speed and scale of speech do not impact whether or not it's got an equal seat at the table. It just means you're cool with any expression as long as it's not threatening. Which there's nothing special about, it's how basically everyone is by default. There's no principle there.
Propaganda is used because it works and scale ends up changing type. Consider the difference from 1 dead cell vs 1 million dead cells at the tip of your finger vs 1 billion dead cells in your arm.
but look at how you're framing it. the undesirable speech isn't a disease the body has, it's a part of the body. we are the collective, even the gross parts. if we want to change what we don't like, we do it with competing ideas, not by cutting them off
These are not competing ideas, they are just lies. I have no problem with the Weekly World News being on a fiction shelf, but we have libel laws for a reason. The truth does not have a sign outside saying 'This is true' and lies repeated often enough get a following.
PS: There is a huge difference between blowing things that actually happened out of proportion to support an argument and saying anything that someone might believe.