A few years back, someone I only vaguely know asked me about vacationing at WDW during Christmas break. I politely explained to her that it's the worst week of the year, to be avoided at all costs. She did not believe me.
She said I didn't know what I was talking about. Said people spend Christmas with family; no one wants to go to an amusement park during Christmas. Said the crowds did not seem bad on TV last year during the Christmas parade.
I told her the parade is taped weeks before, after the Thanksgiving crowd leaves. She actually called me a liar.
A couple of weeks after she returned, I heard through a common acquaintance that her trip was a "disaster" and that she wished someone had told her what crowds were like.
The point is, some people just don't want to hear it.