Simple put: Go ISN'T a true systems programming language because it simple does not work for every and ALL type of systems.
Yes, it may work with some type of systems, but this does not make it a systems language. If you don't want to accept this fact, then you have bigger problems or you reality is narrow.
Maybe this can help you see through your bubble: https://github.com/CppCon/CppCon2017/blob/master/Presentatio...