Phil: But the risk is still there, despite the reason for being a police officer, etc. And the effect is the still the same for the family of the fallen.
And, extending your logic again, Dale Earnhardt was also irresponsible, not to mention every race car driver with a family.
Finally, where would Michael Kelly fall into this? Was he seeking glory or trying to do a public service by reporting on Iraq?
Making having a family contingent on the amount of risk in one's job is probably going to take you down roads you don't want to go.