I don´t know if DPC don´t hire help because he´s greedy, of hard to please and don´t want let go any part of his "creature". But, if the second case is the truth, there are a lot of tasks in a game like this one that doesn´t need to give up any creative control. Coding, for example. Or making certain routine renders, like the ones of empty rooms or sceneries and the ones of the cicle of two characters maintaining a conversation with close-ups of their faces and slight changes of expression, mouths open or closed, etc. Things like those than don´t need creativity, but for sure are time-consuming, and someone could do them for him while he makes more important things. Even if he don´t hire a writer/director and wants to retain control of all the game, there are a lot of things that could do for improving the game and shorten release times, by hiring some help.