For example, a twisted pelvis will cause one hamstring to be more tensed than the other. Stretching overly tensed muscles cannot fix the cause of their abnormal tension. In this example, it neither realigns the pelvis nor addresses the cause of this misalignment, which can be neurological or mechanical. While stretching may make you temporarily feel better, it will not remove a potential cause of injury. This is why stretching, and especially static stretching, before working out does not prevent injuries.
Static stretches reduce the force production of the stretched muscles.
This was shown by several studies. Maximal force production is impaired for several minutes after strenuous static stretching. Kokkonen et al. If you try to make a fast, dynamic movement immediately after a static stretch, you may injure the stretched muscles. Doing static stretches before a workout that consists of dynamic actions is counterproductive.