Are you asking about the value of radar as a tool broadly speaking in addition to basic awareness?
If so, there are numerous reasons including:
- Conditions like wind or attention being focused on something else can lead to typical car noise being hidden or unnoticed.
- Add in the new future of electric cars and their more silent presence and even the basic audio detection we use can be impeded or completely ineffective.
There are several more I don’t have time to summarize, but most are present in the other radar discussion threads if you want a deeper dive.