The part I hate is that the media and everyone is eating up all these new sound bytes for things like "alternative facts" instead of just calling them what they are, lies, and moving on to more important things like focusing on the actual issues. To give it a fun name like that plays into the spectacle and is exactly what he wants.
That's exactly why they said it. Notice how it distracted everyone from talking about the marches? Trump knows how to change the media narrative.