Your point is well taken. However, I don’t think Nancy gives a rat’s ass either. She’ll be voted into office long after she dies. She is the Queen of the Dems and can do no wrong, even when she is doing wrong.
She may care after the next election. Trump is (of course) running, so the turnout for Republicans will be higher. This equates to more Republican seats in Congress, all other things being equal. However, all other things may not be equal - because if she and Chuckie screw up this Wall thing badly enough in the eyes of the public (including possibly the radical Leftists - who will be pissed if a Wall goes up, no matter why it occurs), then the Dems could lose the House again. She will, if this occurs, IMHO be asked to leave as the Minority Leader.