Yes, but for my purposes as a layperson using a currency, I'm choosing to trust a system that is opaque to me anyways (be it a bank/exchange/other financial institution vs a validator pool). One could argue, for example, that anti-fraud mechanisms in off-chain systems don't have a on-chain counterpart, despite being a desirable feature, so IMHO, if the argument goes that crypto can't do things on-chain that regular currencies can, it seems most feasible to just treat them as digital assets to be tradeable over existing centralized systems, no?