6delegates to the constitutional convention agreed to meet behind locked doors and to keep their deliberations secret until the convention was over in order to

Delegates to the constitutional convention agreed to meet behind locked doors and to keep their deliberations secret until the convention was over in order to: avoid becoming beset by a horde of citizens seeking to advance their own interests
By meeting behind closed doors, they will guarantee the secrecy of the deliberations exclusively within their members. In a democratic society, it is impossible to please all spectrum of citizen since the needs for every individuals are very unique