I thought of this same point yesterday I think.One other thought... experience in bonsai means both quality and quantity. It isn't enough to have a good teacher - you have to put in the work. You can watch bonsai masters wire branches all day long, but it doesn't mean a thing if you don't go out and wire lots and lots of branches. Wire 100 trees, completely down to the last bud, do it correctly, and you might start to consider yourself as getting good at wiring.
The reason why bonsai apprentices in Japan show such improvement is that they may be working 12 hours a day, six days a week, for six years straight, under the guidance of an excellent instructor. Compare that to your typical bonsai hobbyist who might spend a few hours a week pruning and styling trees, and you can see how a hobbyist might never achieve the same level of expertise in a decade that an apprentice achieves in their first year.
...and that's ok! Bonsai doesn't have to be a competition sport, and if you enjoy it, much of the pleasure (at least to me) is the journey of building trees and experiencing the joys and disappointments along the way. To make a living at bonsai requires a commitment that (at least to me) would take some of the pleasure out of it by ratcheting up the stress level.
Don't suppose you was also listening to the Mirai Podcast, with Peter Warren? May 7th. Thats what made me think of it, I think Ryan said it.
You have a job.. other commitments, if you've made the mistake of having kids, etc. A lot happens in life, sometimes the HOBBY takes a hit.
Even when you have the time... Sometimes you dont want to wake up early, spend 9 hours working, dinner, and then go back to work on a tree for 3 hours, after having done that routine for a week non-stop. Mental capacity..
Also the fear of failure that Bobby talks about, is me . Ive spoke about it in my threads before. I certainly have a fear of failure, that stretches over all of my life, not just bonsai. But naturally, the more you care about something, the worse that fear is. However, I have also now had to deal with the mistakes that come along with not fighting that fear. Seeing a tree in winter and all the parts you should have removed. Being unhappy with a trees development comes to you and what you have or haven't done. Thats what is currently helping me.. I have an everest to get over, which I am in fact starting in just over an hour from now. As much as I still have the fear of failure, I have no choice, I need to do this.