Yes, and postal workers had 32,213 injuries in 2012 with only 630,000 workers.

https://www.gao.gov/assets/660/658174.pdf

Weak logic there. The injuries listed were from assaults; if accidental injuries were added, the number for police would undoubtedly be even higher.

This is a misleading point. Assaulting an officer ranges from an elbow to the rib during an arrest to beating the crap out of them.

We have roughly 900,000 police officers. A total of 135 police officers were killed in duty in 2016.[0] And 14,453 injuries. We point these people towards danger daily and in a single year only 1 in every 62 of those officers will be 'injured'. I would say that's an acceptable risk for the job if the alternative is the circumvention of due process.

[0] - http://time.com/4619689/police-officers-killed-2016/