As Henry David Thoreau said:
It is not man's duty, as a matter of course, to devote himself to the eradication of any wrong; he may still properly have other concerns to engage him; but it is his duty, at least, to wash his hands of it, and, if he gives it no thought longer, not to give it practically his support.
It's not your duty to fix the world. It's not even your duty to optimize the outcomes of the world as best as you could. The world is not in your hands. There was one trolly problem on this page where everything was blurred, but in the real world you don't remotely get clean problem statements at all, let alone clean outcomes. Not only are the outcomes profoundly unknowable, but the world is full of other people pulling their own levers!
To illustrate it, maybe he should have added one trolley problem where you were given the classic #1 description, but regardless of what you picked, the opposite happened. Or you got a random pick from one of the other people on the site. Or one where a third, entirely unexpected thing happened.