I'm not big on throwing this out there but I've struggled with dyslexia. As an example I wasn't able to read until I was in 5th grade. I can get lost in my own neighborhood. I have trouble learning something without physically writing it down or actually doing the activity. I'm 44 now and I wouldn't say that was a lack of skill from my teachers. When I grew up in the 70's and early 80s there was very little awareness about what to do with kids with dyslexia but it seems like your point is that if these kids just were taught properly then we wouldn't see this symptoms. From my own personal experience I can tell you that's not true at all. I also have a friend who's so dyslexic that he can't drive. He's so crippled by it that he can't even type in his own pin number. If he needs money from the bank I'll drive him and get the cash out of the ATM for him. I'm sure I could teach him how to type in 4 numbers but that's clearly not going to help. This is just a personal story with a sample size of two. I get that. With that said, maybe will shed some light on something that's affected me in a very profound way. best.