Congressional districts are constantly being redrawn, so there's the minor problem with this. The major problem is touched upon, and that's how this results in rural America receiving disproportionate political attention. Most rural areas are Republican leaning, and most urban areas lean Democrat, this is well known. My biggest issue with this is that we've moved so far away from the "land is power" era of Feudalism, but they're willing to move right back to that doctrine just to secure an election victory.
The Republican party has been trying every which way to make sure left-leaning voters don't get proportionate representation. It's gotten outrageous, honestly. But let's look at this a bit more. They're suggesting that rural voters deserve more representation because there are less of them. Let's think about demographics. Rural America is overwhelmingly white while greater racial diversity is found in urban areas. Now, not to harp on the "Republicans are all racist" trope because it's clearly not universally true, but these Republican leaders in favor of increasing the value of rural votes are also, perhaps unconsciously, causing minorities to actually have their votes matter less in a big way. Does the Three-fifths compromise ring any bells?