Pay off debts? That would only cover a few months of current overspending. It wouldn't touch the debt.
As for assigning a value of $20,000 per ounce: if it were fully convertible at that price were the treasury was required to hand the cash to anyone who showed up with the gold, everyone in the world would bring gold to get cash and then buy property or other minerals. We would end up with a lot of gold and other countries would end up with our land.
Integral to your post is the truth that there are other inflation hedges (and for that matter, sovereign debt collateral) besides PM.
Gold buyers/holders have had a nice run since the end of 2023.
An article like this is an attempt to convince new buyers that the current “run up” will continue.
Never buy when the noise & hype gets too loud.