Are actually citing the prolewiki unironically? And even then, those sources and thinkers agree with what I just said.

Value is based on based on perception. Its a made up human thing. And made up human things can be useful, just like dollars or stocks and bonds or dividends, or property deeds, or an exchange rate between precious metals and various goods and services.

Value is all made up and purely subjective. And thats fine. Made up fictional things can still have utility.