In an attempt to close the loop on this topic, in late April the Microsoft staff posted the following within their Answers community:
We’ve heard your feedback and wanted to provide an update on our progress. We are currently busy revising the criteria that trigger yellow alerts in Defender’s device health monitor. Once the revisions are completed, they will be released within a future Windows Update.
Subsequently, a former co-worker of mine who is now a Microsoft employee told me that although the modification isn't formally documented within their release notes, this "false alarm" was alleviated in the May 2017 Quality Updates (15063.296 and 15063.332) for Windows 10 version 1703.