Here we go again. I don't do well with hard opinions on complex issues. If there's a child in the S&C community that's been unfairly bullied over the past few years, then static stretching is the one.
"Static stretching makes you weak and slow."
Really? Gymnasts and martial artists are weak and slow? Look, I get the research, and if you do a lot of static stretching immediately prior to an athletic endeavor that requires high muscle tension, then you are an idiot. But, that does NOT mean it has no value in the world of strength and athletics. Sometimes I wonder if the coaches who are so quick to throw out static stretching are the ones who have trouble clipping their own toenails because their hamstrings (and lower backs) are too cranked up... it's too bad, because maybe, with diligence, they could wear shoes with laces again.
Stretching, just like everything else, is a training tool. If a little is good, it doesn't mean that a lot is necessarily better. Context and need dictate which tools, when, and to what extent.
I'd go on, but I'd just sound like some doofus pseudo-intellectual wannabe. Thankfully, Lyle McDonald (an actual intellectual) has written about this recently in this article entitled Static Stretching and Refined Grain Intake By Paleo Man - Research Review