I hadn't put two and two together and realized that minikube would use a different Docker daemon from docker-for-mac -- that makes this built-in k8s feature a lot more useful than I'd originally thought.

If I need to run a pod with some containers that are in a GCR registry, I can just `gcloud docker pull` them and then run them, rather than having to jump through hoops to configure minikube with registry secrets. That's nice!