It's because people aren't idiots like developers have thought for years. People don't mind a game where you need to read and learn as long as there is a payoff for reading and learning. We have been paying the price for devs thinking everyone is braindead for over a decade now as more and more mechanics and features are removed to please people who were never going to give the genre a chance anyway. By way of example, Dragon Age II didn't get the Call of Duty audience to play Dragon Age, it just convinced most who liked Dragon Age that EA only accidentally published one of the best RPGs of its decade.