Very true....hard to train heavy without getting nicked up. I think its why a lot of raw lifters are now obsessed with dynamic warm ups, mobility and other prehab/rehab.....
Bodybuilders incorporate a wide variety into their workouts and often don't have a "set plan" when they enter the gym. Many have a general idea about what they want to accomplish, but typically leave room for spontaneity based on biofeedback. This variety and loose-structure could theoretically lead to greater muscle growth over time due to decreased likelihood of injury.
The lifter who can come to the gym week in, week out for many years and perform productive, pain-free workouts will accumulate more lean mass than the lifter who is always banged up, training through pain, and suffering from tears and ruptures.
Since absolute strength is paramount to a powerlifter, many times a powerlifter will ignore glaring biofeedback telling them to back off. For example, perhaps the pecs feel a bit strained on bench day, or the low back feels dodgy on deadlift day. The powerlifter will usually stick to the plan and push through it, while the bodybuilder will work around it.
Since the bodybuilder thinks in terms of "working muscles" instead of building lifts, often he'll listen to the body's warning signals and find a movement that doesn't set off red flags. Perhaps he finds that he's able to perform high rep incline presses with no pain to substitute for the bench press, and high rep back extensions and chest supported rows to substitute for deadlifts
