As one of the mentioned consultants, I think the statement that one can learn Kubernetes in a day or two grossly unfair. It is a complicated beast, for better and for worse. The (almost) unique selling point is that it is an orchestration layer that is pretty much provider agnostic in a believable way.
I didn't mean to imply you can learn it in a few days, but you can certainly learn the basic design principles and overall approach, and its pretty consistent across all the k8s products.