You are right, but talking about whether to use k8s or not would make the article 2-3x longer. It is a totally different topic.

ECS (with Fargate or EC2) is awesome but one might argue that it is still an overkill for a lot of people.

Some people look for scaling, immutability, effective resource utilization and they think they NEED containers. That is not entirely true. A lot of people would do totally ok with one EC2 instance.

Either way, kubernetes is awesome, there is a big community behind it maintaining a lot of tooling, docs, how-to guides, etc. That is very valuable for a lot of people too :)