Kubernetes is so easy that you only need two or three dedicated full-time employees to keep the mountains of YAML from collapsing in on themselves before cutting costs and outsourcing your cluster management to someone else.

Sure, it can be easy, just pick one of the many cloud providers that fix all the complicated parts for you. Though, when you do that, expect to pay extra for the privilege, and maybe take a look at the much easier proprietary alternatives. In theory the entire thing is portable enough that you can just switch hosting providers, in practice you're never going to be able to do that without seriously rewriting part of your stack anyway.

The worst part is that the mountains of YAML were never supposed to be written by humans anyway, they're readable configuration your tooling is supposed to generate for you. You still need your bash scripts and your complicated deployment strategies, but rather than using them directly you're supposed to compile them into YAML first.

Kubernetes is nice and all but it's not worth the effort for the vast majority of websites and services. WordPress works just fine without automatic replication and end-to-end microservice TLS encryption.