See, this is the thing I was responding to earlier, before the argument about controllers was made to me.
I don't see omitting a quit button, if there is an X at the top of the screen, to be laziness. If I was in charge of making a video game for the Windows Store, and I knew that in UWP apps, a quit button always appears when the user moves his or her mouse to the top of the screen, I can see myself making the conscious decision to not put a quit button on the main menu. This is the opposite of a lack of careit is, in fact, a conscious effort on my part to fit the platform I'm on (UWP) as much as possible.
Now, maybe this is why I shouldn't be put in charge of a video game. Or, maybe Remedy really did not add a quit button just because they couldn't be botheredthere are certainly many other reasons to believe that this was a half-baked release. But, well, I just don't see it in quite the same light everyone else does.