I think this is a highly uncharitable rephrasing of what's being said. This sort of hyper-partisan lens I think can ruin one's ability to reason through what's actually being said. It's strawman-ing, in other words.
What's _actually_ being said is "LA county's population should be listened to as much as Michigan state" (for example). No one is saying don't listen to 40 states. They're saying each person should have an equal say in how our nation is governed.
Without that hyper-partisan lens, your argument sorta just looks silly and falls apart, doesn't it? I mean, "it's reciprocal" we value your state's population equally to our own. Those states should listen to us because we listen to them. No one is throwing out anyone's interests wholesale, so we do have a right to govern together and no one should secede?
Being clear here, no one is talking about disenfranchising people of their representation. They're talking about equalizing representation. When your interests are overrepresented this might _feel_ like an attack on you, but it's the same way some subset of men felt women earning the right to vote lessened theirs or some subset of white people felt black people achieving the right to vote lessened their control. It's true in a way, but only in the sense that some portion of the population unjustly and unfairly held more power than they were entitled to. You don't want to look at your voting power that way, do you?