The violence has already occurred well before the implementation/actual need for the law.
the intent of the law was that a person should not have to run for their life when threatened when on their own property.
No, it's not. 'On their own property' is the 'castle doctrine'. 'Stand your ground' is about when you are not on your own property as well.
And the violence has not already occured. Someone in a dangerous situation who could retreat might not if they feel no legal danger.