but it is true and you know it
um, no, I don't know it, because it isn't true. We accept 95% success rate as 'working' in pretty much everything in life. And I didn't leave it at just that (although as a stand alone statement it is fine) I did qualify it to say a very few children cannot manage it.
If it doesn't work do something else
I have no objection to anyone trying something else! Not sure why
you think that is a problem for me.
Your GS had a problem with phonics. From that you are extrapolating to everyone. If your GS had a dairy allergy and couldn't eat school dinners, would you expect the school to stop serving dairy to all children? No. I am sorry that his experience was bad, but that doesn't alter the premise that phonics is good and works.
There was an interesting study on reading which looked at older children struggling in school. Many of these were struggling with reading. When they tested these children, they had very poor basic phonics. Looking back at their school history it was apparent that they had not done well in reception. Some were very young, some had been late developers, and other reasons.
The study proposed that these children had not been ready to absorb the phonics teaching in reception, as they were in some way too immature. Once they got into year 1, the phonics teaching was one step ahead of where they were, and somehow they were never able to pick up the basics. The further phonics being taught wasn't helping as they hadn't mastered the basics.
To test this hypothesis, they took these kids, now year 5 and 6, through a back to basics phonics programme. Within 6 weeks those kids had pulled their reading ages up by 2-3 years, and the results spread across their whole school experience. It was a 100& success as a reading programme. It worked for every child in the study. Bear in mind that these kids had had 'reading support' over the years.
So, I would suggest that 4 kids out of 30 struggling may have other roots than the actual phonics, maybe maturity, maybe specific learning difficulties, maybe???