Because no president will ever again play by your rules--Press will never be relevant, influential, trusted again until they start reporting facts fairly
Sorry, media: Trump has already won his war with you
Joe Scarborough tried last week to warn Donald Trump that there's no way Trump can win a war with the media. The media will always have a bigger megaphone, Scarborough insisted, and if nothing else they can outlast and outtalk any president. This has been conventional media wisdom for decades.
And it's wrong. Trump has already won his war with the media, no matter how his presidency goes. Even if his presidency goes badly and he's constantly under siege by the media - to the point where his approval ratings crater and he fails to win re-election - the media are mortally wounded. They will never again be the force they once were.