Having the best weapon does not you are stronger than other. Anout the cursed weapon thing is that preskip Zoro carry so called cursed sword when he is weaker than any vice admiral .
you claim gorsei is from void century which it is your fanfiction nonsense.
I look it up
https://onepiece.fandom.com/wiki/Shodai_Kitetsu
It don’t even mention bald gorsei have this sword.
Have cursed weapon does not mean you are stronger than everyone. Can bald goseri kill superman or Goku even he has cursed weapon ? It can be hold by weaking because the sword are very sharp and are meant for killing like crazy. It is why they are cursed swords because these swords want to kill. It work when you know the triso sadck of control the weapon and taming. Luffy is stronger than or equal to zoro but he can’t tame any cursed weapon.