They all have risks.
SKA can try to force Demidov to re-sign and if not, his development could stagnate by being forced to play in the MHL for another year. Maybe those knee and ankle injuries become chronic?
Lindstrom may never develop the hockey sense and processing speed needed to be an impact forward in the NHL or that herniated disc in his back may limit his games played and longevity.
Iginla may not develop his playmaking game, and at a modest 6'0, may not find it as easy to play inside the dots and around the crease in the NHL.
Catton's size may prevent him from being an effective player in the NHL and he may not even stick at center.
I can do it for the defenseman, too, if you want. If you don't have a risk assessment attached to a prospect, you are evaluating them with blinders on.