> Firstly the model of sshing into your server and trying to run commands on it directly is more or less obsolete.

Why do you get to declare what is acceptable (using UNIX tools) or what's now obsolete (SSHing into a host)? It's rather presumptuous to believe you can speak for everyone. Perhaps you only ever deploy code using k8s and never need to use a command line but that doesn't mean we all do. There are many reasons one would use these tools and approaches (fun, small scale, investigating problems, anything).