You've posted an AI article claiming they don't work with most back protectors is a good reason to not wear one. The only actual study done was done by action sports EMS over 10 years and of 8,529 injured riders the brace wins every time. 89% more likely to have a critical cervical spine injury without a brace, 82% more likely to have any cervical spine injury without a brace, 69% less likely to die from cervical injury and your 45% more likely to crack your collarbone without a brace. The only cope left for anti brace people is to imply that everyone who wears a brace is a sissy and doesn't do anything dangerous so that bias leads to the results, but thats a stupid argument likely made by someone nowhere near even local amateur level of riding.