Memorized openings only get you so far, and even then there are branches and deviations. There's a reason why repeat games are so rare.
Chess engines generally aren't very good at evaluating openings, while high-level human players can memorize the theory for a large number of openings (and engines can have them hard-coded). The reason engines are so much better than humans is the rest of the game.
AFAIR chess is mostly memorization of "openings", that's why computers can be good at it pretty easily
Memorized openings only get you so far, and even then there are branches and deviations. There's a reason why repeat games are so rare.
Chess engines generally aren't very good at evaluating openings, while high-level human players can memorize the theory for a large number of openings (and engines can have them hard-coded). The reason engines are so much better than humans is the rest of the game.