> It's because it's designed to be used in Directions mode with location services enabled, and only in Directions mode with location services enabled.
If you don't provide a source for this, I'm going to call bullshit.
Screenshot of desktop Google Maps without sign-in: http://prnt.sc/d4j744
Screenshot of Android Google Maps without sign-in: http://prnt.sc/d4jwdy
Both look full of street names to me.