Conceding there are risks inherent to CrossFit (or anything) is a good reason to consider alternatives. Then, you'll see the alternatives have risks, too.

Then, you may personally decide to partake in any activities for which you are willing to accept the risks.

And again, CrossFit isn't a magical, dangerous thing. CrossFit = a branded mix of strength/speed/endurance exercises. You can do it reasonably, or over-do it.

Rugby or football, on the other hand...