Deadlifts can lead to injury, but doing them correctly can PREVENT injuries. For instance, deadlifts can greatly help strengthen the glutes.
Stronger glutes allow your musculature to cushion any excess pressure that would otherwise go to the knees.
In fact, unlike most sports - the movement patterns, when done correctly, allow our knee joints to move in ways they are designed to. Versus many sports movements with lateral twisting and impact from sudden stops and changes in direction.
The deadlift is an exercise that engages multiple muscle groups in the body, which helps us build strong and stable frames. It can also enhance our abilities and performance for exercises and non-exercise activities.
Additionally, this exercise can strengthen the lower back, as it imposes a good posture at which the lower back muscles work.
The deadlifts are the most powerful movements you can do.