This is a way I could relate CCW to the officers life.
Imagine having your wife walk through the ghetto's at night by herself from a late nights work. Would you feel comfortable with this? As mentioned previously, pepper spray would be a good defense but isn't always effective since you have to be close in to use it, maybe 10ft, and it will not always deter a criminal.
Alot of states mention that crime rates are low so they don't need CCW laws, basically if it ain't broke don't fix it. However unless your crime rate is ZERO right now, it can always be improved. The letter implies that CCW holders increase the crime rate, but do they have any reports and data of CCW related crime to back that up?
Finally, this is what my police department had to say today about a string of rapes occuring here: "As much as we like to be proactive, sometimes we are reactive." I would not be confident the police would prevent my loved ones from being raped.