You can't always trust how much contribution someone had on a work just because their name is in the credits, unless they're literally the initial creator.
Like, Suicide Squad Isekai is written by Tappei Nagatsuki from Re:Zero, but is it written by him or is it "written" by him?
Gen Urobochi's name has been on more mediocre projects than I can count and almost all of those are just him basically signing off after giving a synopsis or writing the first couple episodes, Aldnoah.Zero being the most notorious example, but there are plenty. Does anybody really believe this man even dipped a finger into Ice Queendom despite his name being at the top?
https://i.ibb.co/Twbb1b6/20240223-211737.jpg
https://youtu.be/qj9p6IFSlnk?si=cZ5L4OPM0TjVjwCD