You are missing the point. There is a set amount of Representatives (435), and the smallest district by population is Wyoming's at 577,000. In California the average district population is more like 745,000. That gives a Wyoming voter a disproportionate amount of power, and obviously Wyoming and California are just the two clearest examples, this concept plays out over the entire country.

So even in the House which is supposed to be most representative of the majority - the minority has a significant advantage.