Sorry, but no
This doesn't mean anything
There's no swordsman, DF swordsman and Haki swordsman, this is absolute fanfiction, sorry
Kaku used his DF even more than his swords... and yet calls himself a swordsman, nothing more nothing less
All strong swordsmen, Oden, Zoro, Rayleigh, Mihawk, Shanks, Vista and so on... all of them use Haki... that doesn't make them less swordsmen than they are
Oda labelled all these characters and many others as swordsmen, it's not like he ever cared about this "pure swordsmanship" bullshit, that was never showed, stated or implied in the manga or any source
When Zoro went to Mihawk asking for training... the latter teached him some circus trick with the sword? NO. He teached him HAKI. Is Zoro who uses Haki not a swordsman? And Mihawk who teached him that is not a swordsman?
Now Zoro even learned Advanced Conqueror Haki. He uses that not only to upgrade the power of his slashes, but also even to create some Haki barriers. I guess that makes Zoro not a swordsman anymore, huh?
I mean... this argument is so bad it became a meme
So, with all due respect, this is a terrible argument.
DF swordsman, pure swordsman, Haki swordsman... these things don't exist. The ones labelled as swordsmen are swordsmen, nothing more, nothing less.