Kelsey Hightower is a rather pivotal person in the Kubernetes world. It's unusual that he's basically cautioning people not to use the system he's so involved in. His point is that many people are doing microservices wrong
Kubernetes is a deployment strategy. It should be orthogonal to microservices.
I'll delete the comment if I was unnecessarily cruel or missed the sarcasm. It was not intentional. But it is important to understand that you want to think of persistence and deployment coupling as independently of your microservices strategy as possible. The vast majority of problems we see with people implementing microservices is people carrying baggage over from some previous project or pet technology. K8S's great. It's just not relevant here.
You're right, though k8s is often associated with microservices you can deploy a monolith with it. But there's a disconnect where as an expert in associated areas he's saying people aren't doing microservices properly, and you're saying just do them properly.
It is very relevant though as it has become so tightly connected with microservices and if you are one of the most well known people in the Kubernetes world you will see a lot of applications that should not be microservices.
I think Kubernetes can be used well with monoliths that are actually more monorepos. You keep the code and dependencies in one place, and then use the service definitions within your cluster to define your boundaries. (Imagine an application where your front end, back end, and background workers all share some objects, but not all of them)
