I didn’t say weight training is dangerous, only that Westside training appears to be more likely to result in injury than more conventional strength training routines, especially when combined with sprint training. Rotating your heavy lifts around on a regular basis causes more soreness and stiffness than sticking to the same exercises for most of the season. Doing sprint training on sore and stiff muscles is likely to result in injury.
Moreover, unlike powerlifters, people training for the sprints do not need to reach their full strength potential in order to maximise their performance in the event they are competing in and are thus probably better off using a more basic lifting routine that a) leaves them with sufficient CNS reserves for their sprint training and b) doesn’t make them more likely to get injured.
I’m not aware of any studies comparing the incidence of injury amongst Westside lifters to that seen in people using other types of routines. Please let me know if you have seen such a study.