Earlier quoted context omitted.
The landlord does not need to settle the transaction on the Bitcoin network to spend the money I have payed him. He could spend it anywhere within lightning. This is the crux of your misunderstanding. I really wish people would take more time to understand the things they criticize. There are real problems with lightning, this isn't one of them.
>The landlord does not need to cash the check to spend the money I have payed him. He could spend it anywhere as a third party check . This is the crux of your misunderstanding. Ask your landlord why they won't spend third party checks and you have your answer as to why they won't spend unsettled IOUs on a lightning network. You're free to pull the, "Lightning too complicated for you to understand" but I think you're…
Suppose you and your landlord share the A-B channel. When he wishes to spend the rent money he pays you back in the A-B channel in return for your paying the same amount in another channel to party C (who is likely a node).
For the record, this process is trustless in the sense of the word that no trust is required. Nobody can wander off with anyone's funds.
When party C (or party D, E, F, whoever receives it) actually gets the money he doesn't have to care about the state of things in in the original A-B channel. His money came from the other party is his channel and that's the only transaction he needs to watch. It's not like a third party IOU at all. And, of course because the Bitcoin network can enforce ownership, calling lightning an IOU does not really do it justice.