Yes, detailed street maps are not a panacea, but useful at times.
There were two times where I said I wish I had detailed map because a) bridge was out; or b) toaster thinks this dirt road is paved. And in these cases I don't need to know full name, initials are fine.
If I'm following toaster routes, full street names wouldn't matter.
If I'm going off exploring without a predefined map, I just follow the street lines. In this case, street names also don't matter.