Suppose the article had said "One small step for man, one big step for mankind." You are responding with the equivalent of "What about womankind? There are female engineers at NASA. Isn't the moon landing a big step for women too? Neil Armstrong is clearly a misogynist." We can debate whether to replace "mankind" with a more gender-neutral term. But nobody would interpret Neil Armstrong as having a political agenda against women.

However, you've concluded that because the author described a problem with capitalism but not the equivalent problem with communism, the author must be a marxist.

I generally dislike the word "capitalism" because (like the word "man") it's ambiguous. By capitalism do you mean Private Ownership? a market economy? deregulation? Laissez Faire? Regardless of its definition and etymology, people irl use it to signify different concepts. Which dilutes the semantics and relies on context to properly resolve. In the article, perhaps "capitalism's most durable myths" should have been replaced with "industrialized-societies' most durable myths". But nobody except you seems to have interpreted the article as having a political agenda against Private Ownership.

> we are asked to imagine

not by a cabal, but by "The implicit -- but rarely articulated -- assumption".