If there wasn't the cloud of Russia looming over the presidency, I would be with you 100% If I were in charge of the DNC, I would have been saying for weeks, "until the investigation with the Russian interference has concluded we should not vote on a supreme court nominee because the appointment is for life. If the republicans force a vote, we have no choice but to block it." Then they could spin it as Trump and the RNC are trying to undermine our country's foundation blah blah blah.
On the flip side, I wouldn't go nuclear on this one if I were the republicans. I would let Gorsuch be shot down and go get a super right wing judge then go nuclear. Why blow it up for someone who isn't super conservative?
That being said, I don't think the Dems should block it for exactly the reasons you pointed out.