Gold (or any other metal) may not be a perfect monetary system, but given the nature of the elites that humanity must deal with, it may be humanity's best hope. With the possible exception of Bitcoin, of course.
Gold and all metals are inferior to bitcoin. As you point out,
gold never stands on its own, it always requires a currency that is backed by gold, and no matter how much they swear and promise they will uphold this standard, they always end up printing more notes than there is actual gold and they have to come off the gold standard and back to fiat.
Evidently, you're confusing cause and effect. It is the Gold Standard advocates that say that no currency can live long enough unless it is backed up by gold...