Freedom of speech in their context is of course simply freedom of "their truth" and they want the freedom to say it unchallenged and unchecked. Musk not too long ago said he wanted twitter to become the main source for accurate information, while on the other hand slating journalists for not reporting god emperor Musk's version of the events but the journalists take on it.
All these people like Musk want the news to become what they say, no fact checking, no questioning the sense and sensibility of it, simply what they say should be taken at face value. It's why they constantly try to delegitimize real journalists and make it sound like they provide no value to society or their readers and are instead out to push their own agenda, which is funny because that is literally what Musk, Trump and all the other "influencers" are trying to do on platforms like Twitter and Facebook.