It's mandatory that a person has at least a small amount of self-love, not vanity, otherwise that person would come across as having low self-esteem. The media enjoys throwing inaccurate generalizations out 'there', into society, so there is something to talk about.
If the 'youtube-narcissitic-"I am so special" ' generation wasn't so 'self-centered',hypothetically speaking, then the media might come out with the generalization that the modern youth should be the "low self-esteem" generation.