Kojima: Right now, it’s very similar to movies: You need a lot of money. So rather than doing what you want, doing what you like, you must have a clear idea of marketing and sales. That’s what’s happening to us with FOX Engine; you do not need be an expert in programming to develop a game, but if you have a question, you still need an expert on-hand to provide an answer.
As for expression, that has reached a high level. Video games are trying to reach the peak of entertainment, so game makers should be clear that things like emotion and sound are among the many things that have to be involved. [source] [emphasis mine]
It doesn’t seem as if Kojima is complaining here, but he certainly has no illusions about being able to simply do “what he likes” and “what he wants”. It’s all about marketing and sales. It’s interesting that he would bring up the new FOX Engine as an example of this; does this mean he couldn’t do what he wanted with it, or is it just an example of requiring marketing savvy to get what you want?