https://www.bls.gov/news.release/pdf/cfoi.pdf
I wasn't able to find a source but my understanding is that being a farmer is many times more dangerous on a percentage basis than being a police officer, and that's only counting fatal accidents. I would bet good money that the rate of disfiguring/crippling injury is way higher.
Also, being a police officer, overall, isn’t as deadly as people think. Specific areas are though.
Anecdotally, my grandfather died some time after being burned in a conflagration related to cleaning something with gasoline, and none of his children became farmers. One daughter went to college and became a computer programmer, another started a delivery business, his son went to work for a VA hospital, and his wife sold the farm and became a nurse after her husband died.
It's hard to imagine conditions that predate your parents' time, and most people at this point are probably more than one generation away from their farming ancestors.
This cites some numbers from the CDC, looks like in America farms are dangerous, can’t imagine what it’s like in China. It says farmers are 2x as likely as police and 5x as likely as firefighters to die on the job. My intuition is formed from knowing that logging is one of the most dangerous jobs in America, I kind of assumed farming wasn’t so far off.
In the United States, agriculture is one of the most dangerous occupational categories. Fatality rate is 7x higher than all workers in private industry, and injury rate is 40% higher than all workers. Additionally, exposure to farm chemicals results in long term health effects.
In China, safety standards are poor in agriculture and often unregulated, so no reliable statistics exist. That said, with reduced mechanization and poor working standards, injuries and deaths are likely far higher.