I didn’t fully attend but when I started classical guitar I was 17 and took private lessons from Peabody’s Julian Gray. He was training me with the intent that I would enroll. All we focused on for the first 6 months was tone production and technique/positioning. He did have me playing some actual (though simple) compositions, so it was not just scales and arpeggios. But getting just the right posture (torso and hand), keeping the proper amount of tension to sound the string and getting just the right combination of nail/flesh (not to mention the annoying nail care/buffing routine necessary) was pretty involved. Looking back with decades of experience and thankfully pushing through some dogma due to breakthroughs like CtC, there are parts of Julian’s approach I’m now a little critical of, but the majority of it was solid instruction and I can’t think of any other way to learn tone production than what he showed me. There’s just no concept of that in plectrum picking. I mean, yes, there’s good/bad sounding pick attacks, but I just think addressing that is so much more simple compared to getting a good sound from a nylon string, with nails. Most other instruments have some other accessory or mechanical aspect that assists in tone production. On classical guitar, really the closest thing we have to that are the frets. Everything else, it’s up to our hands/fingers. The tolerance of error is really unforgiving.
It’s reasons like this that I have huge amounts of respect for anyone who reaches levels like David Russell, John Williams or (my favorite) Christopher Parkening (though his technique is not as good as the other 2…still…he sounds better lol). To get through entire pieces of the classical repertoire with extreme attention to phrasing, dynamics, musicality, rubato etc with seemingly no errors is pretty staggering. I’ve played pieces at the highest level of the repertoire (Barrios, Tarrega, Bach etc) and I just can’t fathom their level of control over pieces of that difficulty. It’s a huge challenge to get through even an intermediate or even beginning level etude with zero errors. It’s such a different type of skill than shredding. But yes, the amount of work you have to put into it to even get above mediocre makes me question it as a hobby. And that’s all it is for me anymore.