Physical gold and promises to pay gold are two DIFFERENT things.
Yes. The former is gold (a metallic element with atomic number 79), and the latter is one form of fiduciary money (a token of exchange of value, where "value" is an opinion about how desirable something is).
Weight of gold has been historically used as a monetary token (until not long after the first coins were struck), and after its abandonment as money in most markets, the new tokens were pegged to gold (some were even
made of gold) until as recently as last century.
Many people appear to associate money so closely with metallic gold that they don't grasp that they are totally different things, or that
the value of gold is almost entirely a consequence of public opinion about the value of gold - and public opinion is also the source of the value of any other monetary token.
There is exactly nothing 'special' or 'different' about gold money as compared to other kinds of commodity money, other than the longevity of gold in history.
And commodity money in general is of very limited utility, so almost immediately on its introduction, fiduciary money in the form of promises of gold (or other goods or services) was created to fix some of its many problems.
Amongst those problems are a lack of portability, difficulty in assaying metal to determine its gold content, and the inability to create gold to increase the money supply when the economy grows.
The latter ability is vitally important for money; But your tone suggests that you dislike and/or mistrust fiduciary money as somehow less "real" than commodity money.
Bits of paper, you point out, are intrinsically almost worthless. However, I am pointing out (to your apparent horror at my heresy) that bits of gold are ALSO intrinsically almost worthless, and that when choosing a commodity to use as money, that is a feature and not a bug.
Your belief that gold has some kind of value that can be separated from its use as a token representing an opinion, is widespread and historically was almost universal. It is also nonsensical and wrong. Belief in cartesian dualism, or that the Earth was basically flat, were likewise widespread and historically were almost universal. These too turn out to be nonsensical and wrong.
Gold has no soul. Its value (other than for trivial purposes like dentistry and optical coatings) is a property of the opinions of people, not a property of the metal itself.
Today gold is valuable for the exact same reason that tulip bulbs were valuable in the C17th, or shares in the South Sea company were valuable in the C18th - because everyone expects that everyone else will continue to participate in the asset bubble. Maybe it will never burst. Or maybe it will burst tomorrow. If and when it does, gold will be essentially worthless, because we have far more of it stockpiled than anyone is ever likely to use for anything.