Someone put it nicely when they said Kubernetes is like an operating system for containers. If you take linux as an analogy, it's clearly a non-trivial investment to learn linux and learn enough to be effective and efficient in it. Further time perhaps needed to achieve the productivity, functionality and performance of what you were used to on Mac or Windows.

Kubernetes definitely achieves this goal well, and in a relatively portable way. But just like any other engineering decision, you should evaluate the trade offs of learning a completely new OS just to get a simple web site up, versus running a nginx instance with bunch of cgi scripts.