I've noticed a large number of manga that aren't tragedies receiving said tag.
Some examples:
https://mangadex.org/manga/14296/hiniiru
https://mangadex.org/manga/19465/idol-na-kanojo-to-wotaku-na-boku-to
https://mangadex.org/manga/11981/aka-akatoretachi-no-monogatari...