Being in control of your body should always be your number one priority, which is why gymnastic elements in CrossFit are so important. These skills will be individually tailored to your level and abilities.
When doing gymnastics you learn how to control your body. You learn how to create a tight mid line and activate your core muscles to effectively and efficiently move and perform challenging exercises.
It takes consistency, patience, dedication and practice, but good gymnastic skills will help you improve in all other areas of CrossFit. If you can lift and manoeuvre your own body then you can certainly lift heavy weight loads!