This author hasn't been to a well-managed gym or worked with more experienced coaches. The same is likely true of those who get rhabdo. They have exposed themselves to more than their body can handle physically, as a result of poor coaching, and/or poor decision making.
I've seen high rep pullups and high rep weighted squats cause Rhabdo in people (not at my gym). I've also seen thousands of people do those same movements (in a safe way) and not get injured. Any good coach shouldn't be exposing clients to those things that expose clients to injury or death.
A responsibility of any gym owner/trainer is to protect clients from injury. If you go to a gym (CrossFit or not) that programs things that expose you to to any kind of injury, then you should absolutely leave. Coaches should be aware of the risks.
If you attempt to lift too much weight, do too many reps, do things with bad form, of course you exposure yourself to injury. I hope rational people would consider that CrossFit is a very effective fitness program, and, despite its criticism, is something that produces amazing results in people if done properly.
Interestingly, my biggest injury was from a heavy single clean and jerk. I've never had Rhabdo and done tons of high rep stuff, but stay away from high rep box jumps, deads, pullups and other silly things. I do enjoy high rep oly lifting in CrossFit and I total 180kg as a 69kg oly lifter. They are completely different movements; to think otherwise is just dumb.
TL;DR - people who are irrational are dumb.