The Senate shouldn’t spend 30 hours debating the nomination of a district court judge or the Under Secretary of Transportation like it does a Supreme Court justice or Cabinet official. It makes sense to shorten debate for such nominees to two hours so the Senate can spend more time on weightier issues.
The Senate’s rules are in place to ensure that it remains the world’s most deliberative body, and shortening the amount of debate for judicial and executive nominees would irrevocably alter that. While there may have been bipartisan agreement on this issue four years ago, there isn’t anymore.