The voters elect senators, who nominate candidates and then vote.
https://www.supremecourt.gov/about/faq_general.aspx
The senate judiciary committee will vote, then the candidate is voted on by the entire senate.
Regardless, the confirmation process is conducted by elected representatives. There is no "this party chose them".
Which has happened quite often?
Now, it causes a political circus.
The voters elect senators, who nominate candidates and then vote.