Because these guys and gals are not famous enough to warrant large coverage, and because the phenomenon is unfortunately so widespread that noone is going to cover every case.
https://endofaspecies.com/oped/the-harassment-of-game-develo...
https://www.bbc.com/news/articles/cx2621gzvkdo
https://old.reddit.com/r/gamedev/comments/zoe13c/passionate_...
https://www.gameshub.com/news/news/video-games-developers-gd...
https://www.xfire.com/authorities-investigating-death-threat...