it too was complete with people arguing against, saying that dressed right angles were natural formations, etc.
Yep, they are always arguing about what natural or not. There's a lot of rock formation that looks like it came out of a hexagon mold factory in Ireland (giant's causway). It was some kind geologic
process when the rock cools that caused that.
But Yonaguni looks a lot like that palace King Ravana built on a stone promontory. It looks like the real deal to me. It was above water at one time and I see no way that such asymmetrical shape can come about on ALL FOUR SIDES by nature. If it was like a scalloped wall on the grand canyon or something like that with no other sides, I would say it was natural. Maybe someday we will know.