It's quite simple really: "communism" was the carrot which the governments of socialist countries dangled in front of their people to distract from all the problems and hardships caused by the top-down planning economy and to move the blame from the elites to the lazy workers who just don't work hard enough to enable the communist utopia (which was like fusion power, always only a generation away).

voted down for speaking the truth

this website and free discussion as a whole would not exist if communist governments had their way, something to keep in mind