Stretching bad for swimming?!

So recently I came across this article here: www.chiro.org/.../Identifying_and_Managing_Shoulder_Pain_in_Competitive_Swimmers.pdf Pay special attention to the bottom of page two, where it states the stretches that could hinder a swimmer's performance. Here is what is says word by word in the article for those who don't want to click the link :D Similar to athletes in other competitive sports, most swimmers conduct a stretching routine prior to exercise. Unfortunately, stretching may be more harmful than helpful. For example, most of the stretches that swimmers perform (figure 1), including buddy stretches (figure 2), serve to stretch the anterior capsule of the shoulder. If the capsule is overstretched, the risk of instability and subsequent injury permanently increases.10 Therefore, the indication for stretching in swimming is limited. Any stretching should be specific to the individual and designed to correct specific muscular or capsular tightness.16 Because swimmers tend to have a relatively tight posterior capsule, which can promote impingement pain, swimmers without pain should focus on stretching the posterior capsule and anterior chest musculature.7 To selectively stretch the posterior capsule without stretching the scapular stabilizer muscles, it is necessary to stabilize the scapula. The easiest way to do this is to stretch the shoulder while lying supine, partially rolled onto the lateral border of the scapula. In swimmers who have kyphotic posture because of tight anterior chest and shoulder musculature, stretching those muscles without stretching the anterior capsule helps decrease the forward shoulder posture and increase the subacromial space.7 Swimmers with shoulder pain should be instructed to cease all anterior capsule stretching and instead focus on posterior capsule stretching.5,11 Swimmers with multidirectional instability or a history of subluxation should avoid all stretching.2 Buddy stretching should be avoided altogether, because it can easily range a shoulder beyond its physiologic barrier and promote further anatomic damage.10 For athletes in whom stretching is contraindicated, a gentle warm-up is sufficient to increase blood flow to the muscles and prepare them for the workout.10,17 I know that the article does state some beneficial stretches but the wording confuses me >.