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Welcome to every single Crossfit argument for the last 10 years. Coaches are bad, high rep oly moves are bad, everyone's form is bad, blah blah blah.
The answer to every single complaint this guy has is that he is in a terrible crossfit gym with terrible coaches. Granted, there are a lot of terrible crossfit gyms out there and a lot of terrible coaches. That doesn't make crossfit in general bad.
Crossfit is a sport, just like boxing, MMA, and skateboarding are sports. Sports come with inherent risks. Deal with it or don't do it. Some people do these sports with the main purpose of getting in shape, but also want to have a little fun since benching by yourself in the morning can get boring. They dumb down the movements to remove some of the risks but still capture the nature of the sport. This is exactly like people who take kickboxing classes at the YMCA. Kickboxing is dangerous, yet no one is arguing that we should cancel all kickboxing classes.
It boggles my mind sometimes. Why are people so offended by Crossfit? Who cares what other people do to get in shape? There are people doing parkour on the top of buildings, jumping dirt bikes over the grand canyon, and snowboarding down mountain sides and no one cares about them. Why is Crossfit special?