What you call the moral imperative wasn't voted on, doesn't have a police to enforce it, doesn't have a judge to interpret it, doesn't have a media to debate it, and you just might happen to change your mind about it a couple of years into the future.
Even if you say that your strategy is to make people (including yourself) feel guilty about breaking this imperative, and amplify this feeling as much as possible so as to compensate for the lack of organization required for a proper law, it is not certain that that will ever work and I don't know of an example where it did work, although it has been tried over and over. And if I may say, it also corrupts human nature so even if it worked I won't be personally positive about it, but that is just me.
That's why its called 'morals'. The compass inside us, we use to decide what's right and wrong. Its the reason anybody does anything - including follow the law when it seems like the right thing to do.
That 2nd part - where did that fantasy come from? Not sure how to respond.
All disputes in a civil society must be resolved peacefully through elections and courts of law. Nobody can be above the law, for whatever reason. What you call morals is something that nobody voted on, nobody debated, no judge interpreted it, no police to enforce it.
Why should I be bound by your values but you can't be bound by my values? You are free to use your moral compass (and should) when voting, when debating, when campaigning, when serving, etc. But once a final vote has happened, the law is supreme and even those who voted it into practice cannot change their mind and decide to violate it, until the next vote happens.
Just imagine what it would be like to establish the "morality police". The first problem that arises is what should be considered moral and therefore needs to be enforced, and what should not be considered moral and therefore not enforced. And how do you decide that? Through voting, debate, a free press, separation of powers, etc.
It is right that democracy cannot cast moral judgement on people who reject it. In this sense it is like a mathematical postulate -- you either accept it or reject it, and if you reject it then your proofs cannot be judged by that postulate.
But the people who value democracy can cast moral judgement, because while they are working to make the world a better place by sharpening points of view and rooting for the best one to win, you are just exploiting the system reaping all the rewards while not contributing anything.
Why the shortcut though, why not make your value a longer-lasting law?
And your neighbour thinks the same. And by the way they have a gun. In a civil society disagreements are solved peacefully through voting and clear structures of accountability so you don't need to guess if you are responsible or not.
Even the same person disagrees with themselves over time. People who vote this way this election, vote the other way the next one.
You devise me a system where people are above the law according to their own judgement at the particular moment they see fit, and still not have violence.
This is why you can fight your entire life for the reform you like to see happen, and still not get it. But 50 years of exchanging ballots is always better than 5 minutes of exchanging bullets.
Even if you say that your strategy is to make people (including yourself) feel guilty about breaking this imperative, and amplify this feeling as much as possible so as to compensate for the lack of organization required for a proper law, it is not certain that that will ever work and I don't know of an example where it did work, although it has been tried over and over. And if I may say, it also corrupts human nature so even if it worked I won't be personally positive about it, but that is just me.