Nobody's suggesting that blind people can't think.
Actually, that is, IMHO, exactly what some people are saying.
They seem to be saying that the blind WOULD shoot wildly, without being sure of target, or even perhaps sure of the real presence of a threat, with
no thought whatever to the possible consequences of that action. Because they would not control themselves, we must control them, for their own good, and for ours.
I think that the blind are acutely aware of their disability. They realize that they cannot visually identify a threat, but that does not mean that the blind could not identify that someone is an immediate lethal threat by other means, and eventually during the attack identify the attacker's exact location.
You seem to believe that the inability to
visually check for Rule 2 should take away the right of armed self-defense. If the person learns a muzzle-sweeps-the-ground draw (as most of us learn), then, I guess if their were silent innocents on the floor of her home as she drew her gun on her attacker, she might sweep them.
Similarly, you think that inability to
visually check for a Rule 4 should cost her the ability to shoot an attacker strangling her. Well, I submit that any sighted person being strangled by a larger attacker probably can't check behind the attacker (if they would even bother) as they bring their gun to bear.
Yes, you do seem to indicate the blind can't think: that they would be unaware of their disability, unable to come up with reasonable compensatory strategies, and unable to contemplate the consequences of their actions. And so should lose their right to effective (armed) self-defense.
Any person who understands the consequences of their actions should, IMHO, be allowed to exercise their full rights until such time as they have demonstrated that they will harm others intentionally or recklessly.