TIL; until the SNES, generally Nintendo didn't program their games, they used contractors. As in, those coders weren't Nintendo employees.
Which is weird because, why this is not a more widely known fact? Or may be I wasn't paying attention 🤔
So Nintendo did the hardware and the game design, and that "game design" is what is generally referred to as "creating the game", as if programming it wasn't really relevant.
e.g. Donkey Kong arcade was coded by 4 programmers from Ikegami Tsushinki Co.