Why is senatorial courtesy so important to a newly appointed judge?

Senate courtesy is a practice in the United States Senate in which senators will not confirm candidates for official positions without the approval of the senators of the requesting state. It is done to set positions such as seats in the Supreme Court. This is important for a newly appointed judge because it is a significant practice for the president to elect suitable people where the Senate offers the opportunity to comment on nomination proposals for candidates.

Slander.