Just an aside, it's slightly opposite from what you said. Google doesn't want software engineering at a larger scale to enter into the world of domain specific

Just an aside, it's slightly opposite from what you said. Google doesn't want software engineering at a larger scale to enter into the world of domain specific folks at all. So they specialize in giving domain specific folks a very tight coupling to the computer without a care in the world for most anything other than a narrow band of parameters. They very much have an org for generating software that treats domain specialists as pluggable domain optimizers. Architects and SRE all enable that.