Diversity can be preserved for 86% of the green card quota. Why does need to be there for the other 14%? Already this is forcing companies to make investments

Diversity can be preserved for 86% of the green card quota. Why does need to be there for the other 14%? Already this is forcing companies to make investments in offshore centers as it is difficult to hire here. There is enough proof this is bad for Americans but the current political climate makes any change impossible.