What confuses me is that the driving test is equal to the UK test in terms of demands
Could also be the quality of driving instructors. I have observed a few drivers and they don't seem to have a clue about correct gear changes, approach to junctions, and of course overtaking. Mybe new drivers are also influenced by the established manner of driving in Poland. We only really learn to drive after passing our tests'. I wonder if most people just learn in a bad environment.
By the way, I was thinking more about why the driver gets the punishment.
I suppose it also prevents the policeman/woman writing out 4 x zl100 fines when he/she can just write out 1 x zl400. Not to mention the 3 points, which was shocking for me. Probably yes in future I would think of the points more than the (smallish) fine.
Funnily enough I remember working around the UK with my Dad around 20 years ago (in HGV's). For some odd reason we didn't have to wear seatbelts!! My Dad was a real stickler, so it must have been law.