well they ARE right. every manuever is unsafe. But on the same note so is sliding down a snow covered hill with things atched to your feet is to. its all just part of being outside on the snow. you get what you put into your practice when you free ski you are basicly practing on being a better all around skier/rider and the same thing is goes for the park the more you practice the better you get the safer the moves that you pervelously learned become.
just my $0.02