> you still have to secure the HSM
Obviously.
> There's no shortcut to MPC/multisig with 3+ keyholders.
The whole concept of a stablecoin seems to be based on centralised trust. Ultimately there is some org that has the fiat bank account, that mints and redeems the coins.
Nope, that is the foundation of bad stablecoin. Trustless decentralized stablecoin like DAI exist. People just largely don't do their homework and prefer scams that lure them in with promises of 'yield'