The credit score system wasn't invented to oppress, period. It was invented to keep lenders from having to guess whether someone they lend to is 'good for it'. Before that, it was all based on assumptions, which naturally led to conclusions being drawn based on things like appearance, race, sex, etc.
I'd rather be judged based on the fact that I can prove I repay my debts, and nothing else. A credit score system is the means of proving that.