The media does not want you to know the truth about firearms. They have not been honest about this for at least 40, when the Democrats started the BIG push to outlaw firearms ownership.
It is very difficult for people to vote for candidates/issues when the press is totally biased.
The media doesn't want us to know about a whole lot of things [which might embarrass people with the power to make the media suffer for their transgressions], hence the constant diet of random violence and celebrity gossip. Both subjects are a safe and reliable distraction, guaranteed to not offend any advertisers or legislators - or not very many, at least.
Irony: the media is considered to be largely liberal. Corporations are considered to be decidedly not liberal. The media is owned entirely by corporations - and not very many of them, at that.