Privacy is difficult because it is legislated.
Legislation is open to interpretation, differs from jurisdiction to jurisdiction, and people have different understandings of concepts such as consent. This is further complicated by the evolution of networked communications, or ubiquitous computing (or AI).
Nonetheless, computational technologies are a valid means of addressing the issues involved by positing that privacy is important, regulated by different legislation (even within the same geographic jurisdiction) and that organizations do not understand how to apply privacy rights or fulfill obligations under these laws.