This should be obvious to most people, yet somehow it's still discussed over and over again with dozen different, insane takes.
"Anyone who uses a sword is a swordsman!"
"Anyone who uses a sword for most of their attacks is a swordsman!"
"Anyone who uses anything other than a sword ain't a swordsman!"
"Anyone who uses other stuff as much as swordsmanship ain't a swordsman!"
"WSS is about the mastery of pure swordsman skills!"
Literally every single one of these takes are complete and utter headcanon. Pure fan opinion. Oda did not give a manual on what makes a swordsman. And becoming WSS is not your dream or mine, but Zoro's.
Only thing that matters is how Zoro thinks. And according to Zoro:
You can use your sword for plenty of your attacks, and yet still not be a SM if you don't consider yourself one:
Likewise, you can use plenty of things other than just your sword (Cabaji relied on beyblades and fire tricks) yet still be a swordsman if you consider yourself one:
AKA, fighting style isn't super important. Swordsmen have vastly different fighting styles even between themselves. Only thing that matters is if they're canonically considered swordsman... either per their own words, or by the narrator/Oda.
Anything else is irrelevant headcanon.
Also, what's WSS, you ask?
"I can't lose, not even once, to anyone who calls himself a swordsman," vs a swordsman who constantly used beyblades and random tricks to fight.
Should be self-explanatory.
"Anyone who uses a sword is a swordsman!"
"Anyone who uses a sword for most of their attacks is a swordsman!"
"Anyone who uses anything other than a sword ain't a swordsman!"
"Anyone who uses other stuff as much as swordsmanship ain't a swordsman!"
"WSS is about the mastery of pure swordsman skills!"
Literally every single one of these takes are complete and utter headcanon. Pure fan opinion. Oda did not give a manual on what makes a swordsman. And becoming WSS is not your dream or mine, but Zoro's.
Only thing that matters is how Zoro thinks. And according to Zoro:
You can use your sword for plenty of your attacks, and yet still not be a SM if you don't consider yourself one:

Likewise, you can use plenty of things other than just your sword (Cabaji relied on beyblades and fire tricks) yet still be a swordsman if you consider yourself one:

AKA, fighting style isn't super important. Swordsmen have vastly different fighting styles even between themselves. Only thing that matters is if they're canonically considered swordsman... either per their own words, or by the narrator/Oda.
Anything else is irrelevant headcanon.
Also, what's WSS, you ask?
"I can't lose, not even once, to anyone who calls himself a swordsman," vs a swordsman who constantly used beyblades and random tricks to fight.
Should be self-explanatory.