This is fairly superficial-sounding, but just look at the difference between people of different genders, races, socio-economic statuses, or abilities. People are all going to perceive culture differently based on their experiences within these divisions. No two people think exactly alike and that's because free-thinking individuals - even of similar backgrounds - are going to have different experiences and opinions that influence their culture.
The way this manifests itself is that people that grew up in the same or similar areas are still going to have differences - even if only minor ones.
Internationally, cultures are diverse and often clash (sometimes violently). Culture is a source of comfort and familiarity, even if to an outside eye it seems a bit skewed or close-minded. People adhere to their culture because it's what they know. The way that culture is controlled (by government, powerful individuals, corporations, rebel groups, etc.) has a lot to do with the effects on the individual.
As sort of extreme and stereotypical examples - think of third-world nations with strong culture, but corrupted and greedy governments and rebel groups seeking control by destroying the culture to control people for their personal benefits. Culture on the other hand in first-world nations is often exaggerated and glamorized for corporations to control people for their benefits (buy more to fit into this cookie-cutter culture).
I'm having a hard time wrapping my head around your question to be honest, but those are my somewhat developed and initial thoughts. Hope that helps.
