Sounds like complete nonsense to me, another made up story.
I would not have placed that remark on pprune just for nonsense sake. Those words came from a highly experienced and respected (now retired) Boeing 787 simulator instructor with whom I have corresponded for over 15 years on technical matters, in a personal email to me and while he was undergoing his initial 787 type rating at Boeing prior to his conducting type rating training on type. Take it or leave it...