If everyone was an individualist, and no one was ever a collectivist, we wouldn’t have the great pyramids.
We would have a thousand tiny pyramids each only 2 inches high
If everyone was an individualist, there would be no symphony orchestra. There would be no live music at all except individual instrument solos.
If everyone was an individualist, there would be no society at all. Because no single individual ever built a skyscraper by himself, or paved a interstate road by himself, or dug a city sewer system by himself. Those were all endeavors that required close knit cooperation within groups of people (collectives)