Originally the House of Representatives represented the people living in the state, the Senators in the Senate represented the State's government so the population was not considered a factor in the number of members in the Senate. Two Senators represent a state regardless of the population. I would actually like to see the Senate go back to being an appointed position.
As you elucidated, there is a balance of power which is incredibly important. The United States of America was designed to prevent fascism and oppression by whatever party was in power at the time. And it was also meant to represent that back in "the old days" that New York, Philadelphia, Boston, Chicago, etc. didn't dictate how the country was meant to be governed. Those of us in "flyover" states need a semblance of representation or we'd never agree to be part of a such a dictatorship.
Conveniently enough, most libs never learned these basic historical facts. Even though they claim to be the "smartest discussion board on the internet".