Here's the difference, Kamiya CREATED Devil May Cry, Viewtiful Joe, Bayonetta and Wonderful 101.
Megaman was created by Akira Kitamura and
Tokuro Fujiwara. Inafune did jack all but did designs for enemies and concepts for Megaman X (which was just Zero).
It's like crediting Ono for a Street Fighter when Takashi Nishiyama and Hiroshi Matsumoto created and design the series and Sakamoto for Metroid but Gunpei Yokoi and Makoto Kano created it.
Fans were miseducated. Inafune was never the father, he was the step-dad at most