Two details to remember amid the turmoil over Kavanaugh's confirmation battle: (1) There are 51 Republicans in the US Senate (2) They will do anything to ensure a 5-4 conservative majority on the Supreme Court Everything else is commentary.
I suspect it is more that they want to force him through to show liberals that they don't have to care what they think or about women etc. It's a power move to show dominance that I also suspect they believe will lead to disillusionment on the left if they pull it off.