It basically boils down to a missconception and false expectations of what "unsyched" means, yes - I know, I dont have to tell you that, though...
But during this thread it has become more and more clear that some people are drawing wrong conclusions from the data they've collected (=their personal experience). They've seen EX-primals being faceroll easy when done unsyched and concluded "unsyched=100% kill", now that they are faced with content where thats not the case they dont revisit their own thesis to match the data they've obtained but insist that the content is broken since it doesnt match their expectations anymore.
The same logic could be used to say that Brayflox Longstop isnt a dungeon and shouldnt be in duty finder because of it since every other dungeon took place in some dark-ish, inside area and therefore we must conclude that dungeons are required to be dark, nasty places. This would even work a bit better if we're only considering the first three dungeons, which are all caves - so after someone has done those three, they could conclude that dungeon=cave (and they could even back it up with "evidence" from other games, may it be FF or not, since it often does apply). Halatali still fits this pattern, but as soon as they reach Haukke Manor, it doesnt apply anymore, so we would have to revisit our definition of "dungeon". Latest with Brayflox since that isnt even a dark, nasty place anymore but instead a flowery outside swamp (one of my favorite dungeons btw!).
Pretty much the same with unsyched - you might be able to burn through one, two, three bosses... but that does not equal that you can burn through all of them. So its time to revisit your data and thesis and modify it to fit realtiy - reality doesnt has to fit your thesis, its the other way round.
...and maybe I'm taking this to seriously now... but I need something to distract me from my science papers...