Those are a lot of the same things a Sinatra programmer could have said about using Sinatra instead of Rails. And it's true, you can, and in some cases you might even enjoy it (if nothing else, the code is more transparent in Sinatra or Golang).

If, however, you've had the experience of starting a project in Sinatra and ruefully finishing it in Rails, my advice is: don't do full-featured web apps entirely in Golang.