It's like an anonymous check. Don't trust, verify by cashing the check.
Discussion
I get that part.
I need the group mint for onboarding my frens to my lightning node. So that, they and I can keep stuff in ecash without having their worst crypto-fears confirmed on day one.
When they loose the ecash backup keys the mint operator doesnt know how much sats they had. A classic unblinded account model prevents the cost of loss of access.
