That's for a very good reason. Making video games requires enough resources that you make games to satisfy the demands of your customers, not the self-important demands of the developer.
How dare those self-important developers try to make the art they want to make.
There is little to no evidence that a substantial number of players care about dealing with serious topics in a ~$60 video game.
Indeed. The sooner the gaming community grows up and accepts that the medium can be more than shooty-bangs with Michael Bay-grade storytelling the better.
I expect the utmost maturity in dealing with these serious issues from Ninja Theory..
Who was it at Ninja Theory who made that slide? How many other employees knew about it? Did the ones who knew think it was okay? Who approved it? How does the studio as a whole feel about it looking back?
Everyone loves to cite that picture as a kind-of ultimate Ninja Theory shutdown, and while I agree that it was shitty and dumb, it makes no sense to use it that way without knowing the answers to some of those questions.