No difficulty selection option is perfect. Developers need to make the difficulty for each level and for every kind of player perfect, which is not possible. Otherwise we would not have games in the past 30 years (and longer) getting stuck, even if we can change the difficulty of the game. That's why we have so many game guides for all type of games. Hell it might even be a bug or misunderstanding of the player, not just a skill issue. No difficulty slider can solve this problem.

Letting someone else play for you is not reinventing the wheel, that is something we never had in an automated form. Should it be free? Why? There is lot of tech behind it, and development. I understand if it costs money. I personally don't care if it costs money or not, its not something I would use. But I think its great to have for those who need it. ... let's just put the Ai problems to the side for a moment, I am talking about an ideal case.