> Every exercise/activity has some risks. If anything, I'd say crossfit puts you at risk for other injuries (back, joints, heat exhaustion at competitions, etc.).
One of the benefits of team sports (the few that I like to play, anyway) to me is that they are fun. One of the downsides is that, since you're engaging in a dynamic environment with other people, injury is more likely. What's great about lifting weights is that, with proper precautions, the chance of injury is very small. It's just you and the weights. Just your own form. The most advanced and ballistic move might be an olympic lift, but you don't need to get involved with those. Personally, I'm not willing to take up a solo exercise routine where the culture is so hardcore/idiotic that I am at risk of permanently damaging myself through sheer force of will, without even having any playing objects or tackling opponents involved.
It is possible and actually is easy. One such example is in Hypertrophy-Specific Training, which utilize week long rest and highly metabolic exercises after rest.
Another example is Westside Barbell Conjugate System, which utilizes rotation of exercises, metabolic exercises and actually forbids athletes going over 85% of 1RPM.