I remember Simon Williams or Andrew Martin pointing out that the objective of chess is to checkmate the king, not to reach a favorable endgame -- or a playable middlegame for that matter.
Yes, although the latter two are valid means to achieving the ultimate goal. I tend to think about it like this:
The objective in the opening is to kill the b--tard, or failing that, to reach a decent middlegame. In which, the objective is to kill the b--tard, or failing that, to reach a decent endgame. In which, the objective is to kill the b--tard, or failing that, to survive.
masters have not memorized 100,000 opening moves. It is a little silly to say this.
Apparently he was hidden in a master's closet while he was studying, and saw it all.