Legislators are there to directly reflect the opinions and interests of their constituents, judges are there to have expert knowledge of the law and how it applies to each case uniquely. The first needs some form of democratic mechanism to ensure that they represent people’s current opinions, the later needs a meritocratic mechanism to ensure they are experts in the correct fields.
If judges were the only element of a court I would agree that it would be problematic to have no democratic input, but in common law systems at least that element is represented by juries who are the most powerful element of a court case as they are unchallengable arbiters of fact and drawn through sortition which is even more democratic than election.
I wouldnt go that far, both elegance are simplicity are important. Sure using obvious and well known language feaures is a plus, but give me three lines that solve the problem as a graph search over 200 lines of object oriented boilerplate any day. Like most things it’s a trade-off, going too far in either direction is bad.