The problem is what does any of that mean? Am I a journalist right now because I'm disseminating my writings to the public using a means of interstate commerce, e.g. the Internet? I'm guessing probably not, but the law
should give me all the protections and recognize all the rights that a journalist has. It shouldn't be the government's place to decide who is or isn't a journalist; everybody is a journalist and should be protected accordingly.
If everybody is a journalist, then there's no ambiguity. But if the law says that some people are journalists and some people aren't, now there are two classes of citizen and it isn't even clear which is which.