什么叫"不可避免的悲剧"?

这些勇于负责的枪民就避免了所谓"不可避免的悲剧":

A pair of men armed with handguns entered a T-Mobile store in Chicago, Ill. in an attempt to rob the establishment. An employee, and Right-to-Carry permit holder, responded to the threat by drawing a gun ...

A homeowner in St. Cloud, Fla. was at home with his family and a friend when he heard a suspicious noise. The homeowner retrieved a gun, went to investigate, and came upon someone trying to break into the house. The homeowner responded by ordering the intruder to leave. When the home invader did not comply, the homeowner shot the criminal during a struggle. The home invader, who an investigation revealed had a significant criminal history, later died at a hospital. (Orlando Sentinel, Orlando, Fla. 12/24/15)

A group of four people attempted to break into a home in San Antonio, Texas by removing an air conditioning unit from a window and crawling inside. The homeowner responded to the break-in by retrieving a gun and firing at the intruders, striking and killing one, and causing the others to flee. A knife and a bag, containing a gun and burglary tools, was found next to the body of the deceased intruder. Police captured the three intruders who fled the gunfire a short distance from the home. (KSAT, San Antonio)

88-year-old Arlene Orms was at home alone in Miami, Fla. when an intruder kicked in her door. Orms responded by retrieving a .25-caliber pistol and firing at the home invader, prompting the criminal to flee.