If Hanon was so bad how could he have graduated from and sent student's to grad school at Julliard and Peabody?
I think there have been a series of posts in this forum, that target specifically this kind of argument. The main point being that, if you don't really know how something works and follow the method blindly, you might just be wasting your time.
For example, if I told you that chopin played so well, because every night he kept a copy of both his etudes and his nocturns under his pillow and after years and years of doing this he became a great pianist, would you believe me? Would you go to the same lenghts, of making sure there is a copy of both the etudes and the nocturns under your pillow every night to try and improve your playing?
Say you do believe that it is true (i'm not acutally suggesting that you do, but for argument's sake), so you start doing it, after three, four, five years... you find your playing has improved but not as much as you would like, and certainly not to the level of chopins. So you decide to write him a letter. More or less saying -
Dear Mr. Chopin,
I have heard from a friend's friend a number of years back, that you keep a copy of your
etude and nocturnes under your pillow and by doing do have improved your playing
during performances. I know that the source is realiable, and would thus have tried it,
but with out as much success.
Could you explain to me exactly how this process works?
Your's kindly,
....
And after a while Mr. Chopin writes back to you saying --
I have recently received your letter, and would like to clearify some points on the techique you have mentioned. It is true that I do keep a copy of my nocturnes and etudes under my pillow as you have mentioned. But the reason for doing so is that my favorite pillow is too soft and I have found that it is bad for my back. Keeping some music books under my pillow has allowed my to sleep better at night and when I give a performance after feeling rested, I tend to play better. I had a copy of the etudes and nocturnes spare from my publishers.
best regards,
chopin
So there in lies the problem with the argument. The only difference being that here sleeping under piano books is low cost (It cost you about 5s a day+ possibly the piano book you are sleeping under.) If you practice hanon, without knowing what you are doing, it may cost you say around 300 hours a year (practice one hour everyday, as suggested, not including sundays and bank holidays). The cost of practicing hanon, without effect can be high.
The argument can be extended, that if you don't know what to do with hanon, it could actually cause you more harm than good, so not only might you be wasting 300 hours a year, you are also ingraining bad habits that will prevent you from becoming a good musician, or will take years to undo. I personally believe that it is certainly possible to do this.
I suppose that is why there are a number of qualified, bona fide teachers on this forum who discourage hanon, especially without prior instruction or knowledge.
There are also various arguments that hanon can stunt your growth musically (possibly true). It goes a long the lines that you switch off whilst playing hanon -- which is I'm sure if you are a serious hanon player, you will. It's not possible to sit down and play monotenous exercies for an hour everyday and not get bored. After a while your mind just disengages and wonders. You don't listen to your playing and are not aware of movement and touch. This is contrary to how one should engage playing the piano. If you get used to this, your musicallity may actually deteriorate.
So in essence, don't treat hanon lightly. It can do you damage, or just waste lots of your time. However, it is a practice tool and it has its purposes -- it is useful if you know what you are trying to achieve.
The argument that it's been used by millions of people over the last 250 years is really not a good one. It probably did more harm to the millions of people that used it over the years than good.