It doesn't because I prefaced my entire argument from a point when even if you are making such a distinction... Oden was just as much of a Sword nut job (Oden Nitoryu and such,) as Zoro & Mihawk and he couldn't make a Kokuto in his lifetime.
No you didn't
you didn't just make the distinction from another view point , this is what you genuinely believe.
and I quote
"
I can see the prospect of others maybe yeah but not Oden.
He's very much a swordsman of the same mold as Zoro.
And Enma was explicitly stated that it could be turned into a Kokuto and we're probably gonna see Zoro turn it into one on panel.
He has no excuse really."
and you are still doing so....
nitoryu , santoryu, these sword styles don't make them more or less of a swordsman.
you can go with that head canon if you think that's logical
am holding reservations on the others ability to
till I see what makes a black blade.
I personally think that's the smarter thing to do.