But if that person you are chasing off the property tries to wrestle (rassle) your pistol away from you, and as you grapple he gets shot...that IS self defense. And it doesn’t not become so, simply because you had the temerity to arm yourself when you went out to confront him.
Congratulations, you just explained MeganC's point.
I'll translate: "THIS, CCW students, is a case in point why we don't pursue a fleeing felon who is not an immediate threat to life or safety, and why you will answer to the law if you do. Leave that to the real cops."