You're arguing against things nobody brought up. Nobody said judges shouldn't be impartial or knowledgeable. It's also not about ”personal interpretation“.

But judging is all but black and white. A lot of laws have wiggle room to varying degrees, and for a reason. Because no two cases are identical and intents and knowledge have to be able to be taken into account. That's why laws are usually a little vague.
For example, a sentence for assault and battery has a degree of freedom (when the suspect is found guilty), the punishment can vary from a fine (of varying hights) to a time in prison (from a few months to some years).

Just because the USA broken system

Stop making everything about that shithole of a country. Stop Killing Games isa european initiative towards EU laws ffs.