It highly depends on the design of the judicial system. As individual people obviously everyone has political opinions, but you can shield the judicial system from being politized. Systems like in Israel where judges or judicial committees have a major say in appointment of judges removes a lot of politics from the equation.
That's how the Prussian/German bureaucracy was designed too. Lifetime civil service and merit based selection basically means the bureaucracy manages itself removed from the political process. The US system is extremely personalized with elections and appointments so it's uniquely nepotistic in a lot of ways.
I'd definitely love to learn about better designed justice systems. A lot of the systems in the USA work to an extent, but there are better solutions. The fed judges often speak about how the 50-state system in the USA should allow experiments in different areas of law and allow the best ones to win, but it doesn't work as effectively as it should.
That's how the Prussian/German bureaucracy was designed too. Lifetime civil service and merit based selection basically means the bureaucracy manages itself removed from the political process. The US system is extremely personalized with elections and appointments so it's uniquely nepotistic in a lot of ways.