It's not that we don't understand the function of the states. The problem is that you insist on using misleading and disingenuous arguments with terms like "voters" and "half the country" when you know full well conservatives don't make up anywhere close to "half the country," and United States voting turn out looks like this:

not the imaginary 50/50 representation you're trying to make it out to be.
It would be one thing if you just defended federalism and left it at that, but that isn't what you're doing at all. You're trying to act like this is all just representative democracy in action when it's far from it. And you know it's far from it and even try to justify it while shifting goal posts all over the place so you can insert as many sneers at Democrats/progressives/leftists as you can. Someone as shifty and dishonest in argument as you are should really keep their trap shut about others not staying on subject.