He didn't change anything, it's just a semantic argument at this point, and thus isn't even particularly entertaining to popcorn over.
His reasoning is valid, however. A great many people carry with the idea that a gun is a talisman that Bad People are afraid of. The mistake is that Bad People don't think like law-abiding folk. Some are predatory, some aren't much afraid of anything, some are crazy, and some are stupid.
This is why you hear about people getting their guns taken off them, or being shot by an attacker they had at gunpoint. They thought that having a gun gave them control and protection, when in fact, it's the gun-carrier's preparedness and mindset that gives the weapon its defensive power.
Some people think, "Well, the chance of needing to defend myself is very low, but I still want to have a gun, so I'll carry one." Their reasoning--and the carry decisions they make based on it--is driven by the idea that they will not have to use their handgun. Ever since I realized people had that mindset, and started thinking about that position, the more bizarre it seems to me. I've heard it used to justify all manner of insane compromises--pistols carried in inaccessible ultra-deep-cover positions for no particular reason, empty chambers, comfortable holsters that can't be reliably drawn from, cheap and poorly-made gear...you name it. I've even heard some "instructors" use that logic to make poor recommendations, including all four items on the above list.
What they should be thinking is, "The world isn't dangerous, but it is unpredictable. Bad things and bad people can happen, and safety is not guaranteed. Every time I put my gun on, I know that today may be the day I have to use it to take a life to save my own." And then letting decisions flow from there. Yes, it's a more uncompromising position, but it's nothing one couldn't live with.
The other thing that happens is that people aren't comfortable with the idea of using deadly force. I think there are a lot more people that feel that way, than the number that would admit to it. They unnecessarily feel ashamed because there exists a very vocal segment of the shooting community that acts as if we should all feel just fine about shooting somebody, and you're less of a man or woman if you don't. In reality it's normal to feel trepidation at the prospect of ending a human life. However, it's also an absolute requirement that the individual resolves that ethical dilemma before they carry a gun.