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 )
Because it implies utilitarianism is the best option by oversimplifying the problem. For example in your example you gave zero details on the situation.
It’s what we call an abstraction. This particular abstraction highlights a moral point.
Not bullshit. Useful and interesting.
Typically, an abstraction maintains the essence of the original. Asking “what if <good thing>, but it costs <bad thing>” isn’t an abstraction.
I’m not aware of a proposed solution to climate change that involves mass torture or murder.
The question feels more like one of those terrible parlor games where you have to pick a few cards and then argue some randomly generated point.