Not really the sate tuple. More like writing to certain positions of the tape results in physical I/O, e.g sending the bitstream over a cable to the display. This phyiscal I/O is outside of the capabilities of the turing machine, but it controls it through writing/reading from the tape.

A turing machine is simplified a finite state automata with random access memory and you can use that memory to setup communication. Yes the communication isn't part of the turing machine anymore, but our computer programs dictate what to communicate and we know what to send to create a certain output. That's what I meant with ingenuity to create these programs.

There is no real difference between any turing complete programming language or program apart from the libraries that help us do what we want.

That Word uses a GUI and sed uses a terminal/console is no difference at all in that regard. Both are a graphical user interface. It's just that Word dictates exactly what it wants to display, while sed just sends text and lets the console dictate how to display that text. Both is using a turing machine to create the data that finally creates an image on our display.