Well, considering programming language, ai generated stuff ist just one or two steps higher. I bet almost none of the so called game devs could program a game in assembler. Or even something higher like C or even Java. If you look at renpy code for a vn game, that is mostly writing literally what should happen. gpt is something of a compiler then, just like c compiler generates machine code, gpt generates c code
Or combining modules like you said. The hard part of flappy bird is not programming the thing, given the right tools and even whole engines. It is coming up with the concept.