I respectfully disagree. Mas gets you to think about those things in advance, so if the time comes when you absolutely need to employ deadly physical force, you won't hesitate.
FYI, all - while the Lethal Force Institute may still exist as a business entity in some form, Mas Ayoob is no longer affiliated with it. His current courses (quite similar to a number of the old LFI courses) are now offered through the Massad Ayoob Group.
I will agree I know nothing of Mas other than what I hear and read, mainly in my Handgun Combat mag, but from those articles he seem to be wanting you to be thinking about all the "I" and "T" while in the gunfight. Myself all I want to be thinking about while in the gunfight is putting little round holes where they need to be.
For me what I need to know is there is a threat facing me and it has reached the point I need to stop (kill it). Therefore my sig line. You don't shoot them in the back nor do you chase them down the street and you don't put them out of their misery.
Know the laws in your state, once the situation has reached the point of no return then think only of the fight. Not the what if's. Because some DA is going to question what you do no matter how you do it. That's his job or at least he thinks it is, because "MY GOD" you used a gun.
LFI-1 or what is now known as MAG/40 isn't meant to scare an innocent person into inaction. It is meant to prepare the average law abiding person for what may "possibly" occur before, during and after a lethal force incident. MAG/40 covers the legal aspects of the encounter because most of us have little or no legal education and are completly unaware of the "trick bags" that can used against us. I'm sure we all know someone whose preparation for self defense consists of going to the range a few times a year or competing in a shooting sport, never giving the legal ramifications of using lethal force a second thought. Or the phychological problems that can occur, Mas makes the point that alcoholism and suicide are not uncommon for those who have used lethal force. There is also the ostracization of family, friends and society in general or as Mas refers to it, "the Mark of Cain". Subsequent to using lethal force a person doing so will always be seen as one who has "taken human life".
As the old saying goes "knowledge is power". Understanding the the legal, physical, phychological traumas of the fight makes them easier to defend against.
If you are confronted with what you, as a reasonable person, ascertain to be actions from a threat(s) that would be reasonably expected to cause your death or serious bodily injury, then you are justified in the use of deadly force in your defense.
Bad situations tend to happen rather quickly. It is my belief (hope, prayer) that my training will guide my actions when I have an OODA loop with a time frame in tenths of a second. Knowing what to say, as well as what not to say, after a situation where you were forced to defend yourself with deadly force is quite important. This begins with the 911 call, "I was attacked and feared for my life and was forced to use my legally carried gun to defend myself". Or, if witnesses are present, make sure they are willing to give a true and accurate account of what transpired.
Another thing. I never shoot to kill. I shoot to stop the threat. If that ends in the threat dying, that's unfortunate for him...