Wrong.
If you have a black belt, you are required by law to warn the other person, retreat, and do what ever is possible, because it is NOT going to be a fair fight. You will have deadly moves instinctively ingrained. So you have to apply due diligence in the attempt to avoid the physical fight. If you still end up killing them, and they were not armed, you likely are going to get convicted.
With stand your ground, you still DO have a duty to retreat as long as there is no property at risk from doing so.
The ONLY stipulation of "stand your ground" is that you are allowed to defend property. If there is no property at risk, then you do have to retreat.
{...
A
stand-your-ground law (sometimes called "
line in the sand" or
"no duty to retreat" law) provides that people may use deadly force when they reasonably believe it to be necessary to defend against deadly force, great bodily harm, kidnapping, rape, or (in some jurisdictions) robbery or some other serious crimes (
right of self-defense). Under such a law, people have no
duty to retreat before using deadly force in self-defense, so long as they are in a place where they are lawfully present.
[1] The exact details vary by jurisdiction.
The alternative to stand your ground is "duty to retreat". In states that implement a duty to retreat, even a person who is unlawfully attacked (or who is defending someone who is unlawfully attacked) may not use deadly force if it is possible to instead avoid the danger with complete safety by retreating.
Even duty-to-retreat states generally follow the "
castle doctrine", under which people have no duty to retreat when they are attacked in their homes, or (in some states) in their vehicles or workplaces. The castle doctrine and "stand-your-ground" laws provide legal defenses to persons who have been charged with various use of force crimes against persons, such as murder, manslaughter, aggravated assault, and illegal discharge or brandishing of weapons, as well as attempts to commit such crimes.
[2]
Whether a jurisdiction follows stand-your-ground or duty-to-retreat is just one element of its self-defense laws. Different jurisdictions allow deadly force against different crimes. All American states allow it against deadly force, great bodily injury, and likely kidnapping or rape; some also allow it against threat of robbery and burglary.
A 2018
RAND Corporation review of existing research concluded that "there is moderate evidence that stand-your-ground laws may increase homicide rates and limited evidence that the laws increase firearm homicides in particular."
[3] In 2019, RAND authors indicated additional evidence had appeared to reinforce their conclusions.
[4]
...}
If they are not armed, then there is no deadly force threat and no evidence of great bodily harm.
We are not discussing possible kidnapping or rape.
And robbery is irrelevant unless you have property to defend.