The alternative is that another politician just appoints someone into the role, which has most of the same downsides while also being undemocratic.
Canada uses Police Boards to vet who should hired (from within or outside the specific force).
Judges are appointed by provincial or federal governments, usually after being vetted by hiring committees.
Our Supreme Court of Canada (SCoC) bases their opinions on far more than “original intent”. They also take into account our Charter of Rights and Freedoms and do not recognize businesses being equal to individuals in having those rights.
As a result we have very few instances of any judges ruling based on their political beliefs vs prior similar rulings or what the law actually states.