That's like saying: "flying is easy, just generate more lift than the airplane weighs - the rest is just noise." No shit, but life isn't so simple. At least for me, controlling weight (now that I'm pushing 30) has been about appetite management, and I've found that keto helps a lot. Not because it changes anything magic about the calorie balance, but because to me 500 calories of steak feels like a meal but 500 calories of pasta feels like a snack.