Replying to How much does the length of your skis matter

I was wondering; I am 6 ft 1 and 165 lbs and I have 169(cm) movement kamasutra's and 189 Stoeckli Snakes. I know a lot of people on ns think 169 for a very stiff park ski is to short. I was wondering what are the disadvantages of having short skis. I have seen dudes my size with skis around 170 kill switch cork 900 on a 60ft jump in les deux alpes. So I know you can kill it on rather short skis. So what are the benefits of shorter skis.( I am more of a backcountry skier. I can max do a switch 5 mute(claim) in the park is.)