Flexibility is listed as one of the (10) General Physical Skills that CrossFit uses to measure your overall fitness capacity.
We all need flexibility to function at our best in anything we do in life. Flexibility falls in line perfect with the saying, "If you don't use it, you lose it".
We didn't all lose flexibility in our thoracic or hips or ankles overnight. As toddlers, our flexibility is through the roof. As we get older, we stop using our range of motion from end to end and we get use to poor positions due to the life we live now a days.
We don't realize where our flexibility really is until we get exposed to it. CrossFit does that better than anyone. Whether it is getting in a set up position or executing a movement, flexibility is what allows us to get into proper position under our own power. Flexibility allows you to move with proper mechanics which then leads to you getting stronger and fitter.
How you may ask?
If you are moving with proper mechanics, you are then able to optimize your muscles and movement patterns at full capacity. You are able to move fast without overstraining your ligaments, tendons or muscles. You are able to move safe which allows you to come back tomorrow. Your body essentially is not fighting against each other. If your body is pulling in two different directions due to poor flexibility, that is your body fighting against each other. You want to move in one direction but your body is pulling you in an opposite direction because the territory you are trying to go to is not safe for you at the moment.
Forcing your body under load into a position you are not able to get into under your own power is a perfect way to get injured. So what am I saying here? Don't rely on loading to get you into positions, get yourself into it. Phrases such as, "But I can get my elbows up with a barbell during the workout" are phrases I hear all the time.
If you are doing static stretching or proprioceptive neuromuscular facilitation (PNF) stretching and using some form of assistance, person or band or barbell, that I understand. That I recommend. Work on your stretching daily. I know, I know it is not sexy so at least stretch form 2-5 minutes after each of your workouts.
If you need guidance on stretches, ask your coaches. If you would like to stretch more at home or before/after your workouts, I recommend checking out GoWOD (app).