The PRIMARY reason for an enterprise to adopt an IT governance framework s to:

IT governance frameworks exist to bridge the gap between IT and business, ensuring that IT resources, strategies, and processes are aligned with and actively contribute to the enterprise's strategic objectives and business value creation. This alignment is the core benefit.

While IT governance can streamline investment decisions, expediting is a secondary outcome, and the primary goal is strategic alignment, not just speed in investments.

Establishing IT initiatives focused on business strategy is an activity facilitated by IT governance, but the primary reason for the framework is the overarching assurance of alignment.

Optimizing confidentiality, integrity, and availability (CIA) is a critical objective of IT security and risk management, which are components of IT governance, but it's not the primary, all-encompassing reason for the entire framework's existence.