You don't understand.

80% of people will think you're an idiot if you advocate for communism.

60% of people will think you're an idiot if you advocate for capitalism.

90% of people will agree with you if you tell them the growing power of elites and the gap between the rich and the poor is a problem.

If you're trying to convince people that communism is a great idea, you're fighting a lost cause. If you use either the word communism or capitalism, you have already lost the argument and people's attention. On the other hand, if you address actual problems, people will support you. Language matters!

(Btw, I pulled these numbers out of my ass. But you get the idea.)