Stretching has many advantages, among other things it helps us to be flexible in our movement (which is an advantage?!).
But why do we need to actively stretch, it seems that the body wants to shorten the muscles by evolution (e.g. when training often in fitness studio). This is the opposite of what we do when stretching.
It seems to be that there are advantages of being not stretched. So what are these advantages / what is the evolutional rationale?
Edit: Why this question is different from this question:
That question asks, why we automatically stretch sometimes after e.g. sleep. The answer is that we stretch the soft tissues because of transitions of high and low activities (especially after sleep, in which we ease the tension in our muscles [muscular antonia]).
This question asks something different. It asks about explicit stretching in sports and not about automatically stretching behavior. The aim is different. In sports we stretch because, we want to lengthen our muscular. The question is why lengthening doesn't seem to be a good thing from an evolutional perspective.
Edit 2: I'm not sure, if it is clear for everybody, what I mean, so I add a succinct example: Why would it be bad (evolutional rationale), if everybody could do a split (gymnastics) by nature (disadvantages?)? In our reality, the ability to do this is almost always an result of stretching. This is only one extreme example, mostly people don't strech to such extremes. Maybe this now helps to understand, for what this question heads.