EDIT Ok so it’s just the trolly problem.
EDIT2 : AHA War Games 1983. “The only winning move is not to play.” (We might call this the final product of a lot of smart philosophical digestion, because it’s a famous movie). There’s always the perfectly valid option to ditch the riddle. (Because maybe the riddle is dumb, or maybe the riddle is no better than a thousand others, utilitywise )
You and me have zero control of the trolley. In fact, statistically we are among the “billions who must die”. Stop wasting your time with philosophical distractions when our lives and futures are at stake now. Let’s kill the billionaires reaping obscene profits from destroying the planet first, and see how that goes. After that, if you still feel that the unwashed masses need thinning, I suggest you lead by example.