As someone who doesn't want to be a sysadmin, but wants to deploy applications to the cloud, the options are fairly limited. Kubernetes handles updates and scaling, networking between services, has managed offerings from all the major cloud providers, has an enormous ecosystem surrounding it, with many tools providing out of the box support for it.

I could use docker swarm, or nomad, but I have to manage infrastructure, write my own integrations, manage the underlying hardware.

Or I can run az aks create and be off to the races