What does Deuteronomy 9:4 mean?

After the Lord your God pushes them out in front of you, don’t start thinking, 'God gave us this land because we’re so good.' No, it’s because those nations are so corrupt that God is driving them out. Deuteronomy 9:4 - Modern Text Bible

(Moses warns against pride. The Israelites aren’t getting the land because they’re better than others, but because the current inhabitants are deeply unjust.)