Interpreting the Constitution is their function. what is 'Judicial Power' then? Advisors? the Executive and Legislative Branches don't need this. They can hire their own legal team to advise them. We may as well get rid of the Federal court system then. You'll never have everyone agree on one single interpretation of a text. If you could then we wouldn't need a Judicial branch at all. Again who would you have as the final arbiter of Constitutional issues? Congress? A national plebiscite? Congress can pass some ridiculous law and we have to wait up to 2 years to vote them out? No way.
Congress can pass some ridiculous law and we have to wait up to 2 years to vote them out? No way. Remember that it was a majority of judges who "passed a ridiculous law", from the bench, making abortion legal, and 40+ million souls have died as a result.
So, judges have literally gotten away with mass murder, and we have no way to "vote them out" after 40+ years.
You're so worried about the Congress that you seem to gloss over the misdeeds of the judiciary without a blink of the eye.