Oh, agreed that "two is already enough", indeed, two are more than enough.
However, as an historian, I think it important to record your dissent and disagreement with such a thing, such an action, such an appointment, in the appropriate forum, at the time.
In The Other Country (aka MR), there are those of a conservative persuasion who are attempting to argue (quite disingenuously, and pretty much in bad faith, to my mind) that the Democrats were "okay" with the Republican attempts to deny a hearing to (let alone a vote for) Mr Obama's nominee for the SC in 2016.
Therefore, it is important, and unfortunately, very necessary, to make it quite clear that the Democrats are not at all "okay" with this, the manner of the appointment, the actual appointee, her character, opinions, experience, qualifications, and the rushed manner of the actual vote.
Unfortunately, even if the outcome of such a vote is known, or clear, or inevitable, in advance, I think it necessary to have set out your reservations and concerns and thoughts in public, in a forum where nobody can subsequently argue that you didn't mean what you said, or that your words were twisted by some unscrupulous media platform, or where they vanish into the ether.
The public records of the Senate strike me as a perfectly appropriate place in which to make such an argument.