This seems like a really weird stance. Who are you to dictate what language people should use? Why CLIs in particular?

I'm just making an opinionated suggestion for the case when you're shipping a tool to end users and you don't want the tool to suck. Attaching a python or nodejs runtime to your tool is a quick way to make it suck for end users. It's laziness on the dev's part who didn't bother learning a better tool for the job.