Productivity = volume x quality
Quality includes workmanship, skill involved, originality and usefulness. For some professions quality, in particular originality, is much more important that volume (for example being an artist, an inventor, an entrepreneur). For others, the scope for quality variation is lower, the focus on volume is higher (for example being a factory worker).
The most celebrated people are those whose productivity is derived from quality not volume. However, most people's productivity stems from volume.