Where does Rita find the motivation to...
I have seen this film 3 times, and every single time I watch it I have the same thought.. where does Rita find the motivation to just kill Tom Cruise every time something goes slightly wrong, and reset the timeline, when she will not be there to experience any of it? The Rita who kills Tom will die in that timeline, while Tom will go back to a new timeline while the day resets. Rita even says in one scene: "let's just reset the day I'm tired," but if they do this Rita will die and stay dead forever, while Tom will wake up to live another day. In real life, Rita would do anything to survive.. to live and breathe. She would try to do anything in her power to succeed in her timeline. To her it's really easy to let another version of herself continue where she left off, which is not realistic at all.
I get that she cares about the greater cause, and that she is a character that wants to be effective and has no time for bullshit, and that she has had this power herself before. But her character has ZERO will to live, and the biggest lack of ego that I have ever seen in a character. She kills Tom (and therefore herself) as easy as somebody pushes a button.
Strangely, I did not see anyone else raise this question.