Shanks fans dont even argue the main point anymore, its basically just Mihawk fans stating facts and them saying "true but shanks is still stronger" it now is a completle useless debate because both sides agree on the argument itself but disagree about the conclusion of that argument.
the thing I always use to clear my head is actually think what it means for the story, like Imagin the highest form of acoc is actually not swordsmanship how would that look in the story? well it would be like this
Mihawk: "look Zoro I teach you about Coc BUT be careful because when it gets too strong you cant fight me for the title anymore"
Zoro: "you are right I will nerf my Powerprogression for the rest of the story so that I still can have a real Duel with with"
completle ridiculous things SHanks fans argue for years