If only 1 person does something it’s not normal. Hell if 1,000 or even 100,000 people on the planet do something it’s still not nominal but the vast majority of that first 1,000 let alone everyone after that going to be followers.

Put another way the first person to ever make pizza didn’t suddenly transform it into a cultural phenomenon. It was enough people copying the idea that transformed the initial concept into one of the most popular types of food.