Thal, I was talking only about Czerny exercices, not about his other compositions.
What I mean is that we can reach a good technical level without much of the "classical" exercises.
A beginner must do some basic exercises, of course. But they dont give "per se" the capacity of play Music.
I have 68 years of piano playing. I began with four years old. And I had the traditional approach: Hanon, Scales, Harps, Czerny, Gradus ad Parnassum (Clementi), Kulack for octaves... More or less 6 to 8 hours/day, sometimes with pain. "No pain no gain"... But I was like theese young chineses "pianists" we can see now in youtube... a little "monkey" in a circus... By my twenties, I could see Arrau, Rubinstein,Gould, Landoska (in harpsichord) and I had a great English teacher, Santiago Kastner who dedicated is life to the Baroc, namely to Bach, Scarlatti and the portuguese composer Carlos Seixas. And I realised that all my "technic" was nothing. So, I refounded all my technic with the principles of the russian piano school, but without the traditional russian approach (inverted scales, 7 months untill pass from two octaves to 4 octaves, etc...). Only looking for a good sound and expressivity. This transition was not easy and I realised that if I was not forced to so many years of technical and dry exercises, all would be easier for me. Now, I spend my days looking for more musicality, sometimes in one only phrase. But this is Music!
Best wishes
rui