It’s not an impossibility, I agree her death was indeed poor writing, but she carried herself and her duties with a sense of pride. Actively seeking death for that purpose would have been immensely out of character for her. I think it more likely she after being around guardians where death is largely relative may have made her more reckless and willing to be a blind altruist leading to her to loose a need for self preservation. But I find it unlikely she’d willing to play that gamble especially after season of the Haunted story; you could argue Safi was just as worthy as Amanda to become a guardian but that never occurred, Hakim died protecting his mother and their settlement and he wasn’t chosen, even Amanda’s parent (I think mother) died protecting their caravan to the last city and she never returned either. Amanda would have had an extremely good grasp that if she died she’d probably stay dead, after all a guardian doesn’t retain who they used to be only snippets even when presented directly with their past: Ana Bray for example.