You keep repeating the same argument while not explaining why people aren't allowed to be mistaken about objects of their valuation. Take gold as an example of a valuable object that still keeps maintaining its value. Gold is seen as a valuable commodity because it is scarce in supply, has a very high stock-to-flow ratio, is very hard to destroy due to its chemical passiveness, etc. All these properties are a part of its nature and literally, all people on planet Earth recognize its significance, therefore, gold is more than just "subjectively valuable." Can all people on Earth be erroneous about the "undeniable value" of gold? Certainly yes, because once humanity comes up with a cheap way to synthesize gold or extract it from asteroids, or find better alternatives, or whatnot, gold will immediately lose all its value and turn out to be a scam or the greatest failure of all times. Or not? Maybe gold won't be called a scam but simply an obsolete type of money which are meant to be replaced by something better? People will be seeking a replacement, namely perfect money, money that can't be debased, can't be found on asteroids and other planets, can't be synthesized in a laboratory, but that can be sent digitally with a speed of light to another person without having to be dependent on the intermediary. Don't you think such money is worth being valued?