The academic articles that you've glossed over explicitly point out that further attention needs to be given to the frameworks within which we look at drone tactics:
From the second academic journal link: "In targeted attacks, with surgical precision, key targets are picked off discriminately. This is far too reminiscent of murder, and does not give the target a proper right to defend themselves against the accusations or discrimination. This issue needs to be considered in further detail."
Note that this comes from an engineering journal, likely targeted at a similar audience as the crowd that makes up HN. It doesn't take any sort of farfetched opining to agree that the issue is more than just "Execution? T/F?".
That is the black/white logic of a toddler or Disney movie.