According to this Esri documentation about the Street Address Role for geocoding using centerlines data source:
https://pro.arcgis.com/en/pro-app/latest/help/data/geocoding/introduction-to-locator-roles.htm#GUID-33FE8601-40D6-4B9D-9642-88BA620759F1
“...Searching for street names is also an option with a locator created with the Street Address role, and the address field in a table of addresses must contain the street name in addition to the street's prefix direction, prefix type, street type, or suffix direction, if any. “
We do NOT want to enable the ability to just validate a street name by itself on our locator. We want to use centerlines for street intersections, but can have users get hits for just a single street name by itself. Such inexact locations (missing any building number) find their way into our 311 system, which is very bad.
Previously (version 10.6.1), this was not an observable behavior; there would not be a match is entering just a single street name by itself.