Let me extend your axiom a little bit...
Since sharing source code with as wide an audience of programmers as possible will almost always bring increased value to your system, then using a language that can be widely understood and modified safely makes it the best language for the problem/domain at hand.
He will use the best language for the problem/domain at hand.
Even if OP is right and GO is a "simpler" language than others, if it allows to solve a range of problems without the added mental load required by, say, C++ why should't he use it ?