I appreciate general knowledge and wide interest Polish shools can give you, especially after I worked with people from UK, and I noticed I knew more about their history than they did, despite graduating computer science :).
But one effect the Polish education system has is rampant cheating. It was expected (if officialy discouraged) that kids good at "hard sciences" will cheat on "humanities". Kids who were good at biology and wanted to become doctors were supposed to care about math and language less, etc. But they still had to have good average grades, so they were cheating on everything that wasn't on the entrance exams for medical schools (nowadays there's final exam at school instead of entrance exams at universities, but it changes nothing - there's still a few subjects you have to be good at and everything else you just have to have good grades in).
In effect adults are saying "this you should really know if you want to be X, and everything else you should somehow have good grades in, I don't care how".
So kids cheated on the subjects they weren't considering important for their future. I had wide interests and treated most subjects seriously but still I cheated on some geography tests because they were absurd - teacher expected us to remember top 5 exporters and importers of each of like 30 different resources and foods. And to remember how many tons of X each produced...
It was literally remembering tables of hundreds of numbers for 1 test and then forgetting them immediately. And that test was the same every year (data was from like 10 years ago :) ), and we had the test and the answers from the previous year. I'm sure the teacher knew it, but making a new one was too much hassle. It was basically an exerise in cheating the system and showing kids how absurd it is and how dumb you have to be to follow the rules.
And then there were subjects that were unimportant for everybody (no entrance exams depended on them), so even teachers teaching them expected everybody to cheat. And that was like 30% of all the subjects in high school - stuff like economy, plastic art, music, philosophy, religion, ethics, defense training, politics and society knowledge, even computer science (because computer science entrance exams were all about math, and computer science in high school was mostly microsoft office tutorial and playing games while teacher pretends to teach).