A professional is playing to win and nothing else.
An amateur usually has a lot more different reasons for learning and playing a game in their leisure time.
Therefore a professional, by definition, is obligated to plow through and endure the strategy of the opponent choosing “mirror Go”.
An amateur, by definition, has no such obligatory, explicit and singilar interest in winning, therefore an amateur can resign that game and go fulfill their reasons for playing this game in their leisure time on a different board, with a different opponent.
Good. Then you should be ready with the opponent resigning within 20-30 moves. 
You see that is my point exactly.
We are trying to play a game to walk into those “unknown fields” generated by the minds of other people and the opponent forces us to walk into the very known fields of our own brain.
No, on all three of those.