Her stance would have carried much more weight, if she had quit the 2024 Harris Campaign, and then left the Democratic Party BEFORE election day. Doing this now, gives the appearance that her decision was made because she wants to be on the winning team, rather than being a decision made as a matter of principle.
Would she still have left the Democratic Party, if Harris had won? There is no way to know, but I tend to doubt it. In all likelihood, this woman would be preparing herself for a position in the Harris Administration right now, if Harris had won.