You clearly didn’t read the article. Feynman didn’t know what cargo cults were, he repeated misinformation from a movie that incorrectly dramatized real practice. And further, his “cargo cult science” definition doesn’t match the modern-day “cargo cult programming” definition.

The point is that the metaphor is not just oversimplified and misinformed, but means conflicting things and is overused to the point that is meaningless.