No, it would not have mattered more because nothing was going to make a difference. If anything, all the Dems could really do is delay a vote. That is what happen when you are not the top dog.
So arguing on Kavanaugh's merits doesn't matter more than focusing on an accusation with hardly any corroborating evidence? Considering how much of a trainwreck this has become for the Democratic Party, at least arguing on Kavanaugh's merits would give a higher probability of making a difference.
Note that I said higher probability. For you to say that it would not make a difference is your opinion only.