Oh come, this is truely gasping at straws. People were not stupid; if there was an actual technical benefit, it would have been known and shared, the same way

Oh come, this is truely gasping at straws. People were not stupid; if there was an actual technical benefit, it would have been known and shared, the same way that people knew and shared other castle construction techniques amongst craftsmen. Tangibly, the absence of evidence for something can’t be magicked away by the “but what if they didn’t record it for a reason because it was a secret!?”. If there’s no evidence, there’s no evidence. You can ponder all day, but it still boils down to, bluntly: there is no evidence that conjecture is correct.