I don't get your point. We are talking about professional software here, there is no "user friendly" Illustrator or Photoshop either. They all require a heavy use of keyboard shortcuts and have learning curves that a broader audience simply cannot get past and all need input devices that a broader audience simply doesn't posses. It takes equally long time to get productive in any of them. The real difference is not in their UIs, but in features, tools, performance, especially performance, Adobe just has more resources to throw at it, and those things can make you noticeable more productive in the long run.