According to Frederick Herzberg's Two-Factor Theory and job design perspective, how did he critically characterize job enlargement?

In his work on motivation and job design, Frederick Herzberg famously critiqued traditional job enlargement (horizontal job loading): The "Adding Zero to Zero" Concept: Herzberg noted that simply adding more routine, uninteresting, or low-level tasks to a job (horizontal enlargement) is merely "adding zero to zero." Since none of the individual routine tasks act as intrinsic motivators, combining multiple non-motivating tasks still yields zero motivation. Job Enrichment vs. Job Enlargement: Herzberg advocated for Job Enrichment (vertical job loading), which incorporates higher responsibility, autonomy, growth, and recognition (motivator factors) rather than just increasing the volume or variety of routine duties.