If justice isn't blind, why do we all know what it should be? Because our legal system is the manifestation of justice in our authority structure, and it isn't doing a good job of living up to the objective principles of justice.
The problem isn't the ideas of justice, the problem is the judicial branch of government.
Justice is blind.
Ideality is not reality though, it is a somewhat useful abstraction, about like any of the sciences; where there is always a scope of application and limitation in the entropy of reality.
The terminology of a Justice system is the primary fallacy. It is a legal system and legislative governance. These are not equivalent. Even the concept of justice is extremely subjective to many factors and perspectives.
Justice isn't blind there are preferred parties. Try bringing a case against a politician or police officer and "justice" will see pretty damn clear that you should stay in your lane.
It never has been, and if it ever were we wouldn't have needed all those statues of the chick with the scales and the blindfold as propaganda.
Does anyone think it's reality? It's an unreachable ideal to be continuously worked towards.
Jury systems never have been. They are collusion to avoid military intervention. et all 12th century.
The modern equivalent hasn't been tested in a couple hundred years. Most of the recent examples of exceptions are in the south for lynching blacks.
Only in the 21st century have we had examples of Jury Nullification that have resulted in something approaching public justice. And even those provided no restitution.