I think that this applies more to a scenario where a currency is first being created. But we won't be in that scenario, we'll be shifting out of a deeply corrupt and mismanaged centralized system of fiat to something new. The new system will not be completely unaffected by this transition.

Prices may vary a bit, payments may need to happen via Liquid or Lightning or Ark or Ecash layers on top of BTC, but all we really need are agreements to exchange some amount of Sats for the things you need to live. Prices are emergent from millions & billions of everyday transactions. Because Bitcoin is scarce everything will basically always be on sale.