@dziamper, so you have got difficulty with logic writing in polish, so i will try, english:
You claim that the most important roads are A/S those roads are tagged `trunk` if their QUALITY is not high enough. 
So if those A/S roads are the most important, then it's logical that roads that are not those have differnt, next most importance? 
In this very example where you try to trick logic, there is already a different parallel S5 and then A4 highway and by logic, those are more important and so the one you want to be a `trunk` is not important enough to be it. 
As an additional explanatory, motorways are not more important than trunks. Motorways are only when their QUALITY is met. 

We don't vote those rules. 
We vote only in extreme cases when someone doesn't agree with those rules and in case of this ceratain highway connection the vote was not even 50%, so that's why it has to remain as it was before. 
People voted and then rules they vote on changed and that's highly incorrect
