I remember a coworker from Utah once telling me that farmers are the most disadvantaged minority or something. Basically his argument was it is better that rural areas get more representation and people in the cities don't need to be represented as much. For him it was an easy argument to make since it is the status quo and serves his interests.
The people who want to change things are who need to come up with either strong arguments to win public opinion or increasingly evident win their rights by direct action. No one who benefits from the current system will give up anything.
The farmer argument is such BS though, believe in some past that is long past and may never have happened.
My grandparents were one of those farming families it would apply to. They had it tough, it was hard to make any money and people relied on them for food. They also were forced out of business half a century ago. Currently farmers are much more likely to be large businesses and definitely not in need of special treatment
It's a variant of state's rights. Basically up until a generation or two ago a lot more people lived in a medum-to-small town. For a lot of those people, the cities were strange places of violence and grossitude. Full of corruption, and evil.
The idea that they would also make all the laws was unthinkable. "Why - they'd let the gays marry! We know there's no such thing as gays!" and so on. (Although practically speaking - where the political rubber met the road so to speak - it was about being allowed to keep humans in concentration camps for money.)
So, back before we knew how conception worked or what an automatic rifle was or even that we were one small part of a larger group of stars called a galaxy - they developed the Electoral College to ensure that everyone had an equitable say. That, and the Senate having exactly two representatives no matter how many people lived there. From a political point of view, it was reasonable at the time.
Fast forward to 2016 and batshit insanity is literally trying to topple the government in a demented coup attempt and it starts to look less like a good idea.