As you become proficient at any skill, a "chunking" the components occurs. A sequence of moves becomes one. While I may have to consider (parse) the individual moves in a given opening, those more proficient can deal with it as a single unit. Obviously, this doesn't just apply to openings but any sequence of moves.
It also applies to everything from video games to martial arts to telephone numbers.
Just a thought.
The truth of this issue is rather more shocking. The Grandmaster Union has it written in their Code of Conduct that no member shall explicitly reveal just how much more clever they are than the rest of us, for fear of reprisals and banishment.