I agree with you. I have two things to say about this issue:
1. Check the experience, credentials and reviews of the trainers who teach at these places. This will give anyone who wants to do Crossfit a better understanding about the trainers who are teaching these classes. I agree with you that there are many trainers who have no experience teaching Crossfit and the unfortunate result is that many people get injured. A Crossfit certification won’t make someone a good trainer (nor will any certification in itself). My concern is that, because of the nature, intensity, and complexity of Crossfit workouts, a more formal education and understanding of the complexities of human physiology is required to teach it safely and effectively.
2. Crossfit is not for everybody (especially for beginners, those with muscle imbalances, prior injuries, or other medical conditions), and it appears to attract all sorts of people at a variety of fitness levels. I admire the enthusiasm Crossfit has generated. I’m not blaming Crossfit for taking everyone under their programs, but they need to have a better way of screening people. I know many who have been injured training at Crossfit, and this is part of why injuries occur. Crossfit is a great concept if it is taught well and if the right people with enough experience are running the programs.
You can also read answers that were posted by others in the past on this topic, as there have been lively discussions here.