How have you come to that conclusion exactly?
He is just as injury prone but we also have the games hhe will miss after his red cards!
In the last 8 seasons, since signing for Newcastle, Dyer has played 222 games. Smith has played 291 in the same time.. Smith is a bit injury prone maybe, but not in the same league as Dyer.
Narr smith hasnt played that many games because he has been a squad player and the one injury he did have was that freak broken leg incident so hardly injury prone.
still i prefer dyers style of play but i have confidence in big sam