One game will sell well on PC, another will not so nothing special here.
There's a lot of PC games out there that would sell very well on PS4 if they were released on the Sony machine.
Also PC gamers love playing with mouse and keyboard for some reason so again nothing really surprising in them playing with mouse and keyboard.
On consoles we play with a controller cause that's how we like it, it feels more natural to me but to each his/her own.
It's special to the devs, because they were actually surprised at how it sold, despite them having targeted PS4 originally.
I know you're trying to put down this kind of news, but it honestly doesn't help, and doesn't really add anything to the topic besides saying "who cares".
It also feels natural to play with a K+M on PC, but there you go.