A person can hold a great many correct opinions and still be unable to think. Formation is concerned with the difference. It asks a fellow to take a position on a difficult question, to defend it against people who know the material, to discover where it fails, and to say so.
This requires conditions that a conference cannot supply. It requires time, because an argument settled in twenty minutes was not worth having. It requires difficulty, because texts that yield on first reading teach no one to read. It requires a closed room, because people will not risk an unfinished thought in front of an audience they cannot see.
And it requires the possibility of being shown to be wrong, in company, without loss of standing. That is the specific discomfort the Academy is organised around. Remove it and the seminar becomes a panel.
The purpose is not agreement. Fellows leave holding a wide range of positions, and the Academy has no interest in narrowing them. The purpose is that each position should have been tested.