Because the tango in that clip was utterly dreadful. Maybe they were rank beginners doing an exhibition throwing in some show moves to make it exciting but it was not an example of tango that would make me want to learn. I didn't think much of the sytycd one either. It wasn't tango it was "show dance" it looked like something Arlene Phillips would come up with on top of the pops if gotan couldn't provide a video. Which is fine if you say: this is a show dance inspired by argentine tango. I don't want my mates to think i go out of a friday night dressed in F Me boots and a bra doing acrobatics and poses. They already think that tango is lame.