They were dead.
You’re talking in terms of the law that has been used for centuries to benefit people like you and oppress people like me. I’m giving you a critique of those laws and how they’re put into practice.
A person with a gun is an inherent threat. That’s why “he had a gun” is justification for shooting someone. Think in real terms, not legal terms. If someone has to point a gun to be threatening, does an unarmed person actually have time to defend themselves against the threat? Not really. So their right to defend themselves is theoretical but not practical.
There are a couple of sets of laws in the analysis here. First, the current state of the law says open carry is legal. So walking around with a gun is not, by definition, an inherent threat - so your analysis is immediately wrong. Perhaps you don't think that SHOULD be the law, but it is so that is what we are dealing with.
I don't think someone necessarily has to point the gun at you for you to perceive a threat, but there has to be something in what they say or do that leads you to believe they are a threat.
For example, to bring up another case that is currently in the news, the dad that was chasing the Arbery guy supposedly yelled something about "blowing your fucking head off" - that plus the fact they were chasing him in their truck and yelling at him, leads me to believe that he could reasonably believe that he was in imminent danger. Using that set of facts I believe Arbery could have claimed self defense if he had successfully attacked and hurt or killed them. (The citizen's arrest laws in Georgia complicate the analysis but we'll ignore that for the moment).
Similarly, in the Arbery case, I don't believe the father and son who shot him will be able to claim self defense - because they initiated the altercation with their own threats. I don't know the citizen's arrest law or how it figures in but yelling about blowing his fucking head off and chasing him in a truck and trying to cut him off while yelling at him doesn't scream "citizen authority figure trying to protect the public" to me. So, assuming Arbery did grab the gun and try to fight back he was justified in doing so because he feared for his life.
If a person with a gun is actually intent on doing you harm, you clearly are going to have a hard time defending yourself without a gun - but that shouldn't change the self defense analysis.
Correct me if I am wrong, but my understanding was that Rittenhouse was running away from people that were chasing him and yelling at him and physically attacking him - and shot them after he fell down and they were reaching for his gun. Was that the first guy or the later ones? At one point he was running away from them yelling "friendly, friendly!!" - right? Was that after he shot the first person and people thought he was a shooter? I can understand the confusion and chaos but this doesn't sound like an active shooter situation - he wasn't shooting at other people and wasn't pointing his weapon - instead he was doing his best to convince others that he wasn't an active shooter.
This is just a terrible situation but I don't know what he could have done at that point. Let's assume the people attacking him really think he is an active shooter and needs to be subdued - they are beating him and chasing him, trying to grab his gun, and even pointing their own guns at him. If he just stops at that point and tries to tell them that he is a good guy, not a bad guy, he has to reasonably believe they will take his gun and shoot him, or shoot him with their own gun. What was he to do, just let them shoot him?