You’d be surprised how many SCOTUS judges have had no years of judicial experience. There used to be 5 routes to the Supreme Court, all roughly equally used until recent years (1990’s).
Politician (Earl Warren, Hugo Black - but he had judicial experience),
Executive Branch (Rehnquist, William O. Douglas)
Private Attorney (Lewis Powell)
Then I think the last two were Federal Court and then State Court...
If I were appointing a judge, I’d want someone that had a deep understanding of the US Constitution(as it was written), and actually applied it to cases as a judge. I didn’t realize there were so many that were appointed without that experience.
Ideologically, I believe judges should be more (small l)libertarian when it comes to domestic matters, but above all else, follow the US Constitution.