There is a saying in Kubernetes "containers are cattle, not pets". That is from a software perspective, the actual saying should be "hardware is cattle, not pets, and your containers are fleas on the cattle's back". If you aren't running on enough hardware for servers to be cattle not pets, then Kubernetes is solving a problem you don't have, and probably won't have for a long time.
Well, it's both. Kubernetes lets you "just build and deploy" your containers without worrying about micromanaging your servers.
Is it complicated? Sure. Are there simpler solutions to that problem? Yeah, for example docker swarm. But I like k8s, it does everything I need, it prevents "server rot" because the state is explicit, and it's not that hard to admin if you know what you're doing.
