See the original GitHub post for how this post is not about scripting other binaries with Bash but pure Bash implementations of functionality. The posted script e.g. does not call nc or grep to make the socket or process the text. What makes this post interesting and upvoted is that it's esoteric.

It's like replying to a thread about implementing a web server in C macros with how you implemented a music jukebox as a standard C program. Great, but also not the point or really even related.