Why do people that choreograph dance so thrashy? Examples inside...

I see this all the time and personally I think it looks ridiculous, I mean I think its taking the whole tempo(?)/beat of the song up a notch of over dancing to the music. I personally think it looks terrible especially when guys are doing this and it seems to be a new craze amongst alot of young choreographers. I don’t know much about dance or choreography but I do know that I don’t think this looks good, can any share maybe some incite on this?

http://www.youtube.com/watch?v=f6JPd94LdN8

http://www.youtube.com/watch?v=_XN9Nt8cWqA&feature=related

http://www.youtube.com/watch?v=4y3n7NT7cvQ&feature=related

Maybe I am in the dark on this one, I mean I kind of get it, and it’s interesting to watch but I feel like most of the songs should be faster for this type of dancing and more electric. Not pop songs…