Any stylistic discussions are like that, I agree. The opinions that Go makes are themselves hand-wavy, like any stylistic opinion.

What's important to me is that the decision is already made, and when me and my team are writing code, we don't have to worry about making those decisions over and over again. They're already made for us. IME the costs/benefits of the different styles are not even worth the discussion, just pick something and move on. This is the aesthetic that I like about Go.