I would agree with the article Why “Company Culture” Is a Misleading Term  published in Harvard Business Review, that "Corporate Culture" is a defence mechanism to preserve a status quo:

Corporations and other organizations do not have cultures; they have philosophies and ideologies that form a process in which there is a constant discourse about the nature and expression of values, beliefs, practices, ideas, and goals. This discourse happens in sales meetings, interactions with customers, board meetings, and in conversations around the water cooler. It’s a constantly moving target.

The problem with the term “culture” is that it tends to essentialize groups: it simplistically represents a particular group of people as a unified whole that share simple common values, ideas, practices, and beliefs. But the fact is, such groups really don’t exist. Within any group characterized as having a culture, there are numerous contested opinions, beliefs, and behaviors. People may align themselves to behave in a way that seems as though they buy into expressed corporate values and “culture,” but this is just as likely to be a product of self-preservation as it is of actually believing in those values or identifying with some sloganized organizational culture.