I think "tradition" is a pathetic way to try to pretend slavery is morally acceptable.No, As the site explained....more traditional.
For Hebrew slaves it was not.It also explained that "slavery" wasn't quite what you like to express it as.
For gentiles slaves it was quite different. That was chattel slavery, the Bible is quite clear on that. It takes some selective reading to think otherwise. But creationists have always been good at that.
Just like the slavery for blacks that Christians in the Bible belt of the US advocated in much of the nineteenth century.