What is the MOST important reason to have senior leadership endorse security policies?

Comprehensive and Detailed Explanation (250–350 words) From Exact Extract from Chief Information Security Officer (CCISO) Documents:

CCISO documentation stresses that policy endorsement by senior leadership establishes ownership and accountability. When executives formally endorse policies, security becomes an organizational responsibility rather than a technical one.

While enforcement and audit recognition are benefits, CCISO materials emphasize that endorsement ensures leadership accepts responsibility for risk decisions and supports enforcement across the enterprise.