That is a ridiculous argument to be honest. 100% of Americans have heard of Nazism. Does that mean 100% of Americans are Nazis? By your logic, more Democrats are QAnon believers (28%).
For what it's worth, AFAIK qanon has only been mentioned/displayed in passing on Fox [1] and while I haven't been on Fox specifically, I've never been prepped or had my wardrobe reviewed on other national broadcasters' programs so I assume they don't exert editorial control either. I'm too tired to do a deep dive for pizzagate so I will admit I may be confusing it with the Seth Rich conspiracy. It's hard to keep track this deep into the abyss.
[1] https://www.mediamatters.org/qanon-conspiracy-theory/definit...