Judicial review is essential to our political process. The federal and state constitutions are more basic to our democracy than any single vote on any one issue. A constitution sets the principles of law. A law that violates those principles may get a majority vote, but it is still a bad law. It is also undemocratic because the Constitution is our highest standard of democracy.
Courts do make mistakes.
But overwhelmingly, we are better off for the results of judicial review. Sooner or later, we are all in the minority on some important issue. If that issue raises a constitutional principle, we will be very glad that a majority can't just wipe us off the map in one vote. That's why the conservatives among our founders insisted on having it. The pockets are just as deep and just as controlling for freshmen as for incumbents.