You mean on the thrower or receiver? On the thrower the danger of the fake - opening the entire field of that pass can leave the entire defence out of position. For the receiver you'd have to see what happened early when the cut starts, but D can take away about 30 out of 360 degrees available to O and typically a good cut gets the momentum and position of the defender working against them and at that point, with all else being equal, a bit of separation is all the receiver needs. These guys make it look a lot easier than it is.
Why does higher level Ulti have terrible huck defense?
You mean on the thrower or receiver? On the thrower the danger of the fake - opening the entire field of that pass can leave the entire defence out of position. For the receiver you'd have to see what happened early when the cut starts, but D can take away about 30 out of 360 degrees available to O and typically a good cut gets the momentum and position of the defender working against them and at that point, with all else being equal, a bit of separation is all the receiver needs. These guys make it look a lot easier than it is.