Damien

Judges are picked because of politics, not because they're the best judges. They have to have reached a high enough point in their careers to be even considered, but beyond that, it's a political decision.

I just googled Jackson and she seems to have already been on one of the highest courts and had previously been approved by the Senate. She was one of the favourites to be selected from the off. Amy Coney Barrett, Trump's pick, was also at the same level.