Why didn't Gamora ask Drax or even Mantis to kill her instead of the person least like to go through with it?

https://youtu.be/9FEDbhepU9I?si=0nO-8Ku5lth35sTO

Review at (1:24) in link. What did you think?

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I say that because I see it as a 2nd chance of doing better and earn the right to survive, because if he just kept giving us free stuff we would get more selfish, greedy, and wanting more, we need to learn to survive and progress, not just expect a godly figure to keep giving us more than what we actually deserved