The article argues that in the field of product design, generalists are more valuable than specialists. Generalists have a broader range of skills and can think holistically across all levels of a product, making them essential for early-stage startups where teams are small and designers need to do everything. As companies mature, they should blend in specialists who have expertise in specific areas, such as motion design or visual design, to raise the bar in those areas. The article suggests that there is no one-size-fits-all ratio for product design teams, but rather a balance between generalists and specialists that depends on the stage of the company's growth.