Gold is 1.5% on average. Is it not a store of value?

Gold was a SoV for thousands of years. Nobody ever argued that it's TOO inflationary. and excuse me, but over all human history were highly incentivized to produce more gold. Your "they'll just mine more" argument doesn't hold water.

good luck teaching normies to do UTXO management without compromising their privacy. 99/100 will opt to use custodial solutions instead.