Insuring 100% balances is fine, it’s up to them to set premiums and banking policy directly.
As long as failing banks fail (stockholders wiped out, assets seized and sold to cover deposits first) there’s no problem with insuring deposits.
I do have a bit of a problem with how broadly bad mortgage backed securities are being bought by the fed to prevent losses from bad investments from failing more banks.
Housing prices are killing our society and there needs to be pressure against the enormous loans nearly every homeowner has.