I could not disagree more jack. There are players that are injury prone and there are good reasons why they are. Some players have too frail of a body for the NFL pounding (ie too skinny). Jay Fiedler went through that his first year starting, and bulked up so that he could take the pounding. Some players have natural technique and instincts to avoid injury. See Curtis Martin, who is excellent at padding himself from hits. Some people do not, see Brent Smith. Are you going to tell me that it is a coincidence that Leon Searcy tore both triceps in two years?
NFL players have to constantly be on their guard and be wary of their processes because they are pushing their bodies to the limits. When you injure one part of the body it changes your technique. Injury-free, a players processes are like a delicate balance that has enabled them to work through high school and college ball. Significantly injure one part of that body though, and the process has to change...the technique has to change. Some areas of the body have to hold up more weight to make up for the injured portion. This leads to injuries in other areas of the body because they are being overstressed.
Want proof? Look no further than Tim Bowens, who had surgery on one knee, then ended up injuring the other knee simply because he was putting too much weight on the other knee due to the injury to the first knee. Doctors actually said this, they attributed his second knee injury to the first knee injury saying that he babied the knee too much and put too much pressure on the healthy knee. Want more proof? Robert Edwards was not cut from the Patriots last year because of any knee problems stemming from his grotesque injury to the knee. He was cut because of groin problems...the same groin problems he had early in preseason with us. The knee hasn't given him trouble since he attempted his comeback (other than the simple fact that his knee doesn't have the same range of motion etc).
But indeed some injuries, most contact injuries I would say, can be quite random (a guy rolling up on the back of your leg etc). However, the majority of injuries in the NFL are not contact injuries I don't think. Brent Smith tore two ACLs during plays in which not a single player touched him.