UST and the other ones were "algorithmic" stablecoins collateralized poorly -- USDC and OUSD (eg.) are collateralized under the regulation of the OCC / by USD-equivalent short-term bonds etc.
This is not to say that there can't be liquidity challenges or "black swan" events, but the current iteration of stablecoins are _comparable_ to being "made by banks" and are certainly regulated.
This is not to say that there can't be liquidity challenges or "black swan" events, but the current iteration of stablecoins are _comparable_ to being "made by banks" and are certainly regulated.