Yes, but......
The three way analysis above assumes that each party is competently and ethically doing their job for the organisation as viewed from their perspective. The problem is compounded by IT architects who once had to "do stuff" but have found an easy life for a number of years by blocking innovation by calling everything a "security risk". This is usually mystified to a degree which frightens off, or trumps, the business line manager and scares the financial executives. The consumer explosion of iPhone-like devices has spoilt the game. They can no longer stop the demand for change, but many no longer know how the architecture of their own systems really fits together. Thus the spectacular crashes.