It does because :
1.Beeing relevant to the plot, and precisely to the void century means you have way more capabilities, than will never have another top tier that hasn't got this relevancy. And even faster growth power wise - this explains luffy's growth. And that no matter what, for example, Roger who was a swordman without black knife but with COC, will never ever be beaten by Mihawk, or whoever, be it even the famous "WSS".
2. If it was about "storytelling" which is different from the meaning of story or plot, Oda should have ended his job, because, there is not any tension anymore between Mihawk and Zoro, because there were supposed to be ennemies, pirates, and the former helped the latter to be trained, because the latter, without any dignity of a swordman, begged him to death.
And overall as i said, this title is only a cope for those who haven't got COC, and thus irrelevant to the main plot. This is not a coincidence that the only one aiming for WSS is the one who isn't a COC user thus linked to void century.
All in all what i'm saying is that, Having COC, beeing a D means everything, and is the main point for the plot, while here in this forum for some everything is reverted and irrelevant individuals blood and plot wise, no matter how much they train, are wanked because those who do it are themselves blocked by their own fate, and are trying subconsciously to cope with it.
This was the point of my thread.