Your last sentence bears no logical connection to the first two.
And I do not believe it "is possible" to reach into one's pocket, pull out a handgun, and successfully protect yourself while getting your "head bashed into the pavement". I challenge anyone to find one real life example where this has happened.
Studies show that guns kept in the home, ostensibly for "self defense", are many more times more likely to be used to intimidate or harm a family member or friend during an argument.
In the San Antonio case you refer to, the "armed patron" was an off duty cop. No one, not even me, is suggesting that we disarm police officers. A trained law enforcement official is much more likely to respond correctly than some drunk jerkass redneck.
Call me confused, but....
"Who is this doing this synthetic type of Alpha Beta psychedelic funkin'?" CHEMICAL BROTHERS