This is true, but it is only half of it. And it is through people that culture moves, not through culture that people move. Without the living breath of humanity, culture would cease. But if you could bring a group of people into the world deprived of any culture, they would soon make one. Much is said about preserving that which is passed down through time.
Much time is given over to remembering our heritage.
Some people would like to feel that all there is in life needs only to be learned. You are born a vessel which is to be filled. You are stamped at birth as such a thing, and that you should be when you die. I prefer to think of people as cultural agents, as agents of change, rather than repositories of some dusty cultural archeology . We need to be more aware of the infinite mutability of life.