Do you think some actions are simply too sad to be brushed off, regardless of how good the end is?

Hypotetical 100%

( Ex: you save humanity and turn the world into a pain free heaven, but the only option to do so is to take an innocent/ Decent person and horrifically torture and abuse them, psychologically and mentally for they'r entirely lives then kill them, would you steel feel sad about it, even when confronted with the pain free world where everyone else is saved?)

( Also would you appreciate someone who would feel sad about it more than someone who wouldn't?)