In a clear-cut self defense situation, Stand Your Ground is perfectly reasonable. When your attacker has buddies (who may not even have been there) who will swear under oath that you started the fight and shot the poor innocent guy in cold blood, things get messy. And very expensive.
Shooting situations are seldom as black-and-white as our daydreams. It’s those common shades of gray that lead to loss of savings, massive debt and/or felony prison time.