How does that prevent country people from being overwhelmed? Congressional districts are based on population.
I'm a little surprised you want an explanation for this: it seems obvious to me, and I suspect you're a city dweller. People who don't live in cities know that country districts generally vote VERY differently from cities in their states. So the country congressional districts would not be disenfranchised by the cities in their states, as they too often are now. Even California has 31 percent Republican vote, which is sure more than were reflected in the winner-take-all election in 2016.