Because I think nobody should be able to silence your thoughts, ideas or opinions but those things don’t encompass all speech.
I'm not saying this should a tool to enable internet censors. This should be used to go after the networks of people people producing this garbage. Unless you operate a website or blog where you are literally making stuff up and spreading it around as fact then this doesn't affect you in the slightest.
A lot of good examples of this surfaced when people were talking about what bathrooms trans people should use. It was an entirely manufactured controversy where no-name fly-by-night "news" sites would publish completely fictional stories about sexual assault cases to try and sway public opinion. I, and you, should be equally as mad at someone making up news stories trying to sway public opinion the other way.