Could she be refusing to send the articles because Ruth Ginseburg life on this earth is coming to an end. When it does she will send it to the Senate in slowing down the process of appointing another Supreme Court Justice.
I think the health of RBG is a major concern for the left. However, I do not know if they are that strategic in their thought process. If impeachment was for a strategic reason I believe it is more likely a proactive defense of her own son, Paul Pelosi Jr., who appeared to be doing the same thing Hunter Biden was doing in the Ukraine (and elsewhere) so she may be trying to frame an argument of partisanship to defend her own interest.
It certainly was not done with any prayerful reverence for the institution. Consider the schizophrenic nature of what we just witnessed and how many times they reversed themselves on what they alleged, terminology, the importance of being hasty, and etc etc.