to longarekel.
I don’t think you are right. as I understand it
one may not give his life for another but one may risk his life to save another. are you sure of your version? I am 90% percent sure of mine.
none of this has anything to do with the topic the thread started with. perhaps davening that hashem take time from your life and give it to another is sensible or silly, possible or not,
but certainly not an issur of suicide. the comparison is rediculous.