Being a Pole, I wish more people understood that. :(
We're in the process of dismantling our democracy by removing all of the checks you mentioned, while supporters of the ruling party argue that democratically elected majority is within full rights to do it.
Just look at what the majority of the people think. There are so many wrong things that the majority of people believe, you wouldn't want those beliefs made real through politics. Also nobody can be even interested in all topics decided.