When Goldman Sachs sell their products who knows what other parts of the company are betting on, hence the Goldman proviso.
. Goldmans aren't your corner dairy, they're an organisation that employs about 40,000 people, what one office is doing might be completely unknown to another.
You said past performance is no guarantee of future performance, implying that the gold price might catch up to other investments. I say it's a pipe dream, because historically precious metals are terrible bet.