If someone is going years without practicing or exercising their choice of personal protection, they may find their own skill sub-par to the requirements of the situation.
should six .357 rounds fail to eliminate your immediate threat...
Then perhaps your threat didn't enter your premises alone, compounded problem if you didn't practice your aim and response for years.
“should six .357 rounds fail to eliminate your immediate threat...”
You might not be dealing with a rapist in a bear suit, but a BEAR in a bear suit;)