Just some thoughts.

Law ≠ Justice.

A law is standardised and therefore objective, justice is a moral value and therefore subjective.

Interpretations should make law more fair. – Keyword „spirit of the game“. – But they also make the rules „subjective“. Keyword „grey area“.

Meaning that for a person this is fair, or at least the fairest possibility within the limitations of the rules – and with regard to the game. For another person it’s not fair. So it can not only differ from referee to referee.