It’s very enforceable. It’s just that it really, really sucks to live in a society that implements that enforcement.

I don't believe you, can you give some examples?

Khmer Rouge killing lots of intellectuals is one classic example, although most socialist revolutions had their own variants.

I suppose you can do a No True Scotsman and say that those weren’t truly enforcing equality of outcome since there were people at the top of that society doing the enforcing, but most would find that argument pretty strained.

it should be opportunity equality, rather than outcome equality.

Everyone should have the chance at getting educated, but not everyone needs to pass or excel - it is up to the individual to succeed, but it is up to society to provide the opportunity to succeed. That is why schooling (primary, secondary and tertiary) should be free for everyone.

And why school funding shouldn't be based on the neighborhood it is in.