Newspapers do not have a specific call-out. The printing press does, which was simply the most advanced method of spreading your speech at the time.
The founders wanted the ability to print what they wanted and, just as importantly, not be forced by the government to print things they didn't want to.
> Wikipedia can fall back on the individual editors' rights
Can it? Then why couldn't any other company similarly fall back on to the rights of their employees. e.g. whoever is compiling the data being sold in the telecom case.
Employees would be seen as acting on behalf of the corporate entity. So really they are proxy and/or talking for the corporate entity. Not themselves.
Most random employees have no usefully unrestricted free speech when their contract often deliberately punishes them if they say the wrong word. Those people working for companies shut up about their work unless they are willing to go whistleblower / they reveal a workplace safety issue / have legal advice etc.