it's self custody that requires two selves lol
it's got the same level of trust though. the protocol makes it so that the worst case scenario you have to pay a bitcoin transaction fee to close the channel.
in comparison, an ecash token is completely worthless if the mint goes down or refuses to pay you via lightning or onchain when you try to redeem it. an exchange wallet is exactly the same in this respect. in fact there is very little difference between an exchange wallet and an ecash token. different authentication mechanism but it's the same trust me bro.