Good education is complex. To do things right, you have to do many details right.
I'm curious as to what examples of good education you are basing this on. If there's somewhere out there providing good education, I'd be very interested in their methods and product. Or is this perhaps based on theory?
Just my experience of many things that can go wrong. Many people notice just one of them and suppose that this is the problem of education, and if you optimize for fixing it, everything will automatically be allright. The most popular example among non-teachers on internet is "creativity", I believe. Just throw everything out of the window, maximize for "creativity" and you are done. Even worse, those people usually can't even taboo "creativity" and tell you what specifically they mean and how specifically would they optimize ...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.