the definition of usury is exorbitantly high interest, not any interest at all.
under Moses the Jews were prohibited from charging fellow Jews any interest at all for a loan, but they could charge Gentiles interest.
If the Law allowed a Jew to charge an outsider interest, and to the world we are outsiders - why would it be unlawful for them to do so? and the world was never part of the Sinai covenant Law, but only Israel and those who made themselves Jews.
Christ said to give to whoever asks you without demanding it back.
Do. you believe that banks should give everyone free money, never expecting to be repaid at all?
to be wise we should not borrow at all. if we can help. it, and when we do borrow, never more than we can repay.
Jesus paid your debt of sin but made no promises about your credit card bill.