But it *would* force McConnell to run through the time-consuming "cloture" process for each nomination, and produce 51 recorded votes twice for each nominee. This has a few advantages:
As is, McConnell doesn't have to produce a single vote to confirm a single one of these Trump nominees. In effect, Dems are letting them all be confirmed by acclamation.
Rather than organize this, the Senate Dem leader gave McConnell consent to instantly confirm 7 Trump judges to lifetime appointments.
Would all of the judges in question get confirmed if Dems had put in this effort? Maybe. Would at least one Trump judge be blocked from a lifetime appointment if McConnell was forced to produce 51 votes twice for all of them? Probably.
If you can get senators behind you, you can wield a lot of power.
If you can't, you're... not a real leader.
I'm laying out what could have happened.
The Dem senator blocking the confirmations would not necessarily have to speak or hold the floor - to force McConnell to hold recorded votes, they'd literally just have to be on the floor to occasionally say "I object."
The potential power lies in organizing a rotation to cover the floor, which requires leadership.
BUT:
It should not be hard to explain voting against a non-home state judge who was ruled "unqualified" by the independent ABA due to questions about his work ethic.