Tell me, if the exact same thing is true of capitalism, then why is it that all of the self identified capitalist societies have the highest education rates, highest literacy rates, and highest standards of living for everybody overall?
"Education rates" and "Standards of living" or somewhat subjective and thus hard to compare (though I guess what you say is true for many countries, with notable exceptions). "Literacy rates" are hard comparable numbers, and looking at that Cuba is not doing bad:
Literacy in Cuba 99.8%
Literacy in US 99%
Source: CIA World fact book: https://www.cia.gov/library/pu...