Final answer:
Mami's statement refers to the importance of pioneers in initiating progress or change, and that individual actions can inspire and lead others.
Step-by-step explanation:
The meaning behind Mami saying there always has to be a first person to do something reflects a significant theme of pioneers and trailblazers in history and personal growth. It suggests that progress or change often starts with an individual's courage to step out of their comfort zone and try something new, which can eventually lead others to follow. The act described, where a mother participates in a collective cleanse and is recognized by onlookers, reiterates the concept that first actions, though daunting, can lead to memorable and impactful experiences.