The speaker discusses the tendency to seek diverse opinions when making important decisions, recognizing the value of heterogeneity in society. This diversity is not only based on concrete factors like age or nationality but also on perceptions and attitudes, which significantly influence decisions and daily actions. The speaker shares a personal experience of how becoming a mother changed her perception of her neighborhood's walkability, illustrating how life stages and personal experiences can alter one's view of accessibility and inclusivity. The discussion extends to urban planning, particularly in transportation, where understanding diverse needs is crucial. The speaker highlights the historical exclusion in public transport design, using the example of high steps in buses that were inaccessible to people with reduced mobility. This exclusion persists in various forms, such as using an 'average man' model in safety testing, which fails to represent the diversity of the population. The speaker argues for proactive inclusion in urban planning to ensure equitable access to transportation, as mobility patterns are linked to social inclusion. Citizens and authorities must work together to prioritize diverse needs and advance societal progress.