Exercises don’t give you good technique. Body awareness and problem solving skills give you good technique.
Good arm and wrist positioning, combined with finger independence and articulation. At high tempos, you need to know how to preserve energy using slight "fudging" imo.
Yes but how can you improve your articulation?
That's like saying, "Lifting weights and working out won't give you big muscles- it's all about body awareness...." Musical technique is a matter of physical skill (neuromuscular control, as in finger independence), and physical conditioning (developing flexibility of tendons, development of the flexor and extensor muscles, etc.) Liszt's own approach to practice (practicing on a muted keyboard, while reading books), reflects that.
Also, you should check out Isidore Philip's Exercises for the Independence of the Fingers. They will give you that professional articulation, which makes all the difference.