Do Law and Justice are not always the same?

In my country Poland we have a party called Law and Justice, I very like to watch certain vlogger who ran centrist vlog here it's called Widoprezentacje it run by a guy who is a lawyer who used to say that in his law school he learned that concept of Law and Justice is not always the same because it's chance that Law will be injust for some people, and if someone is centrist he or she will be thrown of **** from the right and leftwing 

That was some time when left-wing politician could work for hand by hand with right-wing and vice versa but not anymore due to political polarization, and it's seen in almost every country :-(