I have nothing against MKK per se even tho it will, again, open a shit ton of plot holes but Oda does not care about that
What I have issue with is the idea that somewhat MKK makes more sense than ZKK.
The ZKK theory as been ridicule for years, no matter how well explain, no matter how many hints there are, some people still find that the theory does not make sense for the sole argument that no one should take the glory from Luffy. Therefore I have a hard time understanding how MKK should not be ridicule for the same reason.
Imo both theories make as much sense storywise and there are elements that hints towards both paths however it is a high amount of bad faith to not admit that MKK is defend by a lot of people to spite on ZKK.