It definitely is!Navigation is a lost art. To think before GPS I drove throughout Europe just having studied the maps (anyone remember those?) beforehand, and using my noggin and sense of direction. Does anyone have a sense of direction anymore? A compass in the car would be useful too.
Here's the thing, and I love Google Maps, and I prefer to use it to navigate when I don't know where I'm going, BUT...it does not always give the fastest routes. It gives the most commonly used fastest routes. You can test this out if you're driving someplace that you know like the back of your hand and you know streets and side roads that are typically quicker than main thoroughfares. For example, yesterday was my first time taking the Polestar into work from the suburbs down into the center of Boston. Google Maps gave me the expected main artery route options and the expected arrival time. However, I drove the route I know to typically be faster that avoids the main choke points. As it kept updating the route to match what I was doing, it kept dropping the expected arrival time, until I arrived 15 minutes ahead of the original expected time. Google simply does not know how to make use of side streets, unless it detects that a main artery is closed or is brick red with traffic. Then it offers a small workaround. However...it offers that workaround to EVERYONE currently navigating in that space, so you'll see that route backup too.
So there is value in both knowing and learning the area AND for Google to show traffic for all the roads displayed on the map.