Because I assumed it was about Haki, and not swordsmanship, so I waited for confirmation
Like I said, Swordmanship requires haki, sure. Haki does not require swordsmanship. Roger can be a shit swordsman with the strongest haki. Luffy imbues the same Haki Zoro does to his fists, instead of blades. The "skill" at which Zoro uses said haki is different.
This is the same man who merely swiped Oden, someone who was probably the strongest samurai in Wano and almost defeated Kaido, away with his haki alone.
You guys are just not getting the difference, and thats OK, you will at some point lol.