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Most Russians polled support the war. Indeed, if you are telling the truth about who you are and views, then you are risking your life by posting here.
And that's the point: simply having a vote doesn't mean anything. Putin will win with 99% of the vote, just like Xi would in China, and like Kim Jong Un would in PRK.
Simply having a vote, by itself, doesn't mean anything. The US was founded with freedom of speech and press--to take just one example--in order to allow democracy to mean something. It's not as simple as you are making it out to be here.
Actually, I do not believe it is fair to compare those countries with other republics like the United States or any western country where people is allowed to vote. The biggest difference in my opinion is the fact people in those two eastern countries do not even have the choice to vote for other parties which are not the communist party of China and the communist party of north korea. In those circumstances I would even say those people have an actual vote, I would only say people have a vote in places where there are several options for parties to reach the presidency or head of state. I would even put in doubt the status of USA as an actual complete democracy, since the president is not elected directly and there is a very strong duopoly of power between the republican and de democrat party.
If both the Red and the blue parties are aware people will continue to vote for both of them no matter what, then they won't care for actual policies and solving the most important problems of their society, engage in corruption, among other things. If there was a big chance of the third party gaining force there in the north, those two parties would realize they cannot just to continue to engage in political shows and lose time which could be used to improve the life of the average voter.
But these things that you say are shown to not be absolutely correct. Consider what Stalin said, "The people who cast the votes decide nothing. The people who count the votes decide everything."
"But that was Stalin," you say. But the Bolsheviks, from whom Stalin sprang, were financed by the US and rich people from the US - and other countries -
https://duckduckgo.com/?q=who+financed+the+bolsheviks%3F&ia=web.
In fact, the the Ukraine elections since 2014 were influenced by the CIA against the people... just as the CIA controls the results of the US elections. The electronic voting machines have back doors that allow them to be controlled by 'hackers' over the Internet. Consider
http://www.theorangerevolution.com/orangerevolution0.html.
The point is that voting decides little. Rather, voting is a pacification program used by the powerful (the CIA) to pacify the people into thinking that they did their best, or that they won, so that they don't openly revolt and straighten things out. Something like that would take power away from the rich, and the rich just couldn't stand something like that.
Of course, if I were a very wealthy person who was 300 years old, I would probably want to hide this fact from people. Why? Because the rich who are evil are fools. They are going to die someday, and they will ultimately have to face God to account for the evil they have done.