The strongest swordsman in the world already said being PK is harder than being the strongest swordsman .
WB could have been PK and he was above the strongest swordsman .
You can have a weakness and still be the strongest and every character has plot assistance.
The manga is set up that the PK is the strongest or one of the strongest characters in the manga .
Also luffy need a crew so he can sail the grandline that don't mean he going to be weak .
This is shonen manga we talking about .
Shonen Manga or not this doesnt mean much - Goku also wasnt the strongest at the end on of Z, same is true for many other Shonen heroes.
You are moving the goalpost, i was talking about a specific matchup against an enemy that has an advantages imo. I also admitted that in a general and braoder sense Luffy is stronger - but i dont see him taking out Zoro with what they have shown so far.
Of course being PK is more difficult since you need to have it all - power, ambition, the crew, the allies, luck etc. no is arguing against that, at least i am not. You need all that just to enter the Grandline, entering Raftel and finding the "One Piece" means the will to bet your life on everything.
Whitebeard couldnt have been Pirate King because he was lacking the ambition. The Yonkous are an example showing that power isnt the only factor deciding who can call himself Pirate King.
Your Luffy > Zoro arguments doesnt seem to take into account what its really being shown in the manga and come from the fact that he is the captain, main hero etc.
Of course at the End the manga might show more clearly that Luffy is superior or could take out someone like Zorro - sure, but right now i am not seeing it. Sure i might be wrong, but its worth the discussion based on what each character has shown post time skip.