Just because Go lacks many forms of abstraction, doesn't mean complex code will not be created with it. Quite the opposite. It's lack of expressiveness will encourage "frameworks", elaborate encodings, code generation and various productivity aids. Look at what the lack of generics has done to the Kubernetes code base:
"The core team replaced a compile-time language feature that was missing (Generics) with their home-built runtime system"
https://medium.com/@arschles/go-experience-report-generics-i...