Indeed. Lending without expecting any repayment would not be lending. It would be giving. This could be interpreted as a call to generosity. Plain reading seems to rule out interest though. (The more nuanced reading seems to rule out lending at all.)

There are plenty of other examples of modern Christians picking and choosing though. Starting with ignoring the above call to charity (if we read it that way). There are many calls to give freely, yet most modern Christian’s are content with pretty minor giving overall. Or we could talk about how “turn the other cheek” aligns with the distinct non-pacifism that permeates modern Christianity. Or we could talk about taking oaths, divorce, head coverings by women in church, embrace of community property. Etc.

Christian scholars regularly debate how to interpret portions of the Bible. I’m not sure what they are doing if it’s clear and easy to adhere to.