The regulatory view of actions associated with alerts relates primarily to awareness and immediate response.
The alerts, Red / Amber do not imply any particular decision or choice of action.
Fixing activity to a level of alerting may have greater mental constraint than definitions; failing to consider the situation, reassess and plan ahead.
There are operational situations not involving alerting which require assessment and decisons to divert, risk, urgenct, etc. The need for knowledge (awareness) and a flexible mind.
CS25.1322
(1) Warning: For conditions that require immediate flight crew awareness and immediate flight crew response.
(2) Caution: For conditions that require immediate flight crew awareness and subsequent flight crew response.
(3) Advisory: For conditions that require flight crew awareness and may require subsequent flight crew response.
AMC 25.1322 Design Considerations.
Consider the following concepts and elements when designing an alerting system:
Only non-normal aeroplane system conditions and operational events that require flight crew awareness to support flight crew decision making and facilitate the appropriate flight crew response should cause an alert. However, conditions that require an alert depend on the specific system and aeroplane design, and overall flight-deck philosophy. For example, the failure of a single sensor in a multi-sensor system may not necessarily result in an alert condition that requires pilot awareness. However, for a single sensor system, such a failure should result in an alert condition that provides the flight crew with the information needed to assure continued safe flight and landing.