I use Google maps all the time, yes, even when I know the way. Here’s why. Google maps is also tracking traffic and alerts me when “the way home” is blocked by an accident, so I’d better get off the turnpike NOW before I’m stuck in a 45 minute delay. Google maps may show me a new route that I’d never considered before; it often knows about new roads before I do. Google maps has shown me new parts of Philadelphia I’d never seen, new tracks over ridges in Pennsylvania, and routes that avoid tolls.
I can drive home from 800 miles away without Google maps, and I have. But Google maps frees me to pay attention to the flow of traffic. It’s a tool. How you use it depends on you.