I believe that’s factually incorrect. “Yellow journalism” became a known term circa the mid-1890s (en.wikipedia.org/wiki/Yellow_journalism#Etymology…). Meanwhile “journalism” has essentially meant what term means today from an earlier time and has a different etymology:
journalism (n.) “business of writing, editing, or publishing a newspaper or public journal,” 1821, regarded at first as a French word in English, from French journalisme (1781), from journal “daily publication” (see journal); compare journalist. (www.etymonline.com/word/journalism).