All the anecdotes about successful August borns are not that helpful.
The data is there. Statistically summer borns do worse. Academically, emotionally, socially. They have higher rates of anxiety, lower self esteem, higher diagnoses of ADHD.
I appreciate schools are aware of the issue, but at a population level it remains an issue.
And while the gap does narrow it remains throughout school - fewer August borns go to university than spetember borns. Admittedly it's a tiny margin by 18. But it is still there.
My ds is an August born. In his class he is the youngest by 2 months. There have already been 3 6th birthday parties.
If he had deferred he would have increased the age range by 2 weeks! Can't see how that would be a problem.
Allowing parents to choose to defer easily would mean those who feel their children are ready when they have just turned 4 could send them, and those who don't wouldn't have to. Some summer borns will be fine. Not all are.
It's not an ideal solution. But it's the best we have at the moment.
Starting school later would be better.
But it's not something there is a particularly wide focus on. When the GCSE/A Level results come out they always comment on how boys and girls results differ. They don't mention the spread by birth month. And it's there. And significant.