But if Bitcoin is money, why would I not want to spend it? Bitcoin is the liquid capital. You don't think Bitcoin would be the most liquid asset in a Bitcoin world? I think you understand my point but I don't understand why you think someone would seek something more liquid than Bitcoin.
I think you are the one seeing viewing credit through a fiat lense. Credit IS meant to access capital you don't have and this will always imply risks and trust.
I don't see the point of this service in a world where Bitcoin is the most liquid asset on Earth and has absolutely no other utility than to be spent because it's money.