The PRIMARY reason to implement a formalized risk taxonomy is to:

The primary reason to implement a formalized risk taxonomy is to reduce subjectivity in risk management, as it provides a common and consistent language and structure for identifying, classifying, and reporting risks, and facilitates the comparison and aggregation of risks across the organization. The other options are not the primary reasons, as they are more related to the outcomes, benefits, or drivers of risk management, respectively, rather than the reason for risk management. References = CRISC Review Manual, 7th Edition, page 100.