Marking Supreme Court justices on a 2-pole scale does not accurately represent the complexity of their individual voting records.
Looking at the split between Gorsuch and Kavanaugh is a particularly interesting part of this look at the voting record of the court...
Yes but in theory all political positions and decisions are subject to this "complexity". Not all (R)'s or (D)'s are going to vote the same. I'd argue it's better in America because you don't have a party whip whipping eachother into line, although there are other means of getting everyone on the same page.