I would think that would be in a category of it's own. Still handmade but on a large scale.
Kimber does the same thing. One gun one smith (I think it's Kimber). But, they are on the large production scale.
That one guy you mention is probably an apprentice. Or a master handle maker? I don't know.
There are always exceptions to every rule.
And this is all a matter of opinion and conjecture. I don't think there are any hard set factual rules in place that could definitely solve the argument.
So, we are just left with opinions. And my opinion isn't worth much.