A child who starts school barely able to communicate, unable to use the toilet or use a knife and fork is already at a disadvantage...
Yes, and that is something we need to accept. Some parents are better than other parents.
You cannot even that out without some form of state control of children from the day of birth to ensure each is given exactly the same environment and resources.
Even then you'd fail as that doesn't compensate for variation in individual intelligence and attributes. You'd have to disadvantage the smart, ambitious and hard working ones in some way to bring them down to the same level as the others.
In fact,
that is something state schools already do without having a formal mandate to do it - they average kids down because that's the only way you can deal with the insane system of bundling kids together and teaching them based on their date of manufacture rather than their individual abilities. That's why my wife and I home educated our children, we didn't want them "averaged down"! (Yeah,
@Jeff FV I know about streaming,. However, that's just a pathetic attempt to compensate for the original, dumb idea of bundling based on age rather than apptitude.)
When men aren't born equal, any attempt to ensure they die equal is doomed to failure.
- Clinton, 2018
Equality of opportunity may be the soundbite but that ain't achievable either - aiming for equality in
anything is where we are going wrong. We can't get equality, all we can get is
a bit of ironing out of life's injustices. We shouldn't aim for more than a tiny bit.
And, ideally, it'll be society that does the ironing out, not government, because there's nothing so bad that a government can't screw up further.
Life ain't fair, get used to it. (And give up supporting the silly political party that wants to make life fair for everyone!

)