I get it & respect it but never been in a life or death situation so far.
Earlier somebody mentioned the plane crash where survivors ate human flesh &the very idea is abhorrent to me. Ithink I'd never do it, would rather die - but if that unlikely thing happened to me, would i change my mind?
We don't know until we're there.
There is no "there" ... we are always
here, in a life or death situation at least until we do die. My father had a pig heart valve replacement, dying a few months later when it became infected. My sister died after refusing treatment for flu after far too long spent paralysed by MS.
BeRational is correct in that many of the lines drawn in the argument are arbitrary and it is not possible to come to any objective position on the extent and acceptability of suffering.
Every moment of ones life, one is causing the deaths or affecting the continuing lives of innumerable other lives.
Where you draw the line really depends on the extent of your empathy with them. We try and limit it by including "my family" or "humans", or "the same species", or "entities with nervous systems", "sentient" beings - but ultimately it is illusory - we have no real way of separating our "individual selves" from that of our own gut bacteria or the rest of life in the universe. So what we ultimately do to other lives depends on how connected we feel to them and how responsible we feel we should be for their suffering or destiny - and our own.