And if you exclude the black swan event of 9/11 which the US was unprepared for, the numbers get a lot smaller, e.g.:
"According to the GTD, 80 Americans were killed in terrorist attacks from 2004 to 2013, including perpetrators and excluding deaths in Afghanistan and Iraq, the majority of which are combat-related. Of those 80 Americans killed, 36 were killed in attacks that occurred in the United States."
Why would we exclude the largest terrorist attack in American history, the thing that the interventions in question were explicitly designed to prevent a recurrence of?
And anyway, if you want to get into that question, then we'd have to start including the civilian deaths caused by ISIS, and that's going to make the balance even more favorable to drone strikes. There's no reason to limit the analysis to Americans, either. Dismantling Al Qaeda, ISIS and other terrorist networks contributed to the reduction in terrorist violence against many groups, not just Americans. Probably not even primarily Americans.
Not to mention the rather obvious fact that the interventions in question were designed to reduce terrorism, and so their efficacy can only be truly benchmarked against the counterfactual world in which they were not implemented. However, conveniently, the balance is still overwhelmingly favorable even in the actual world that we happen to inhabit.
"According to the GTD, 80 Americans were killed in terrorist attacks from 2004 to 2013, including perpetrators and excluding deaths in Afghanistan and Iraq, the majority of which are combat-related. Of those 80 Americans killed, 36 were killed in attacks that occurred in the United States."
https://www.start.umd.edu/pubs/START_AmericanTerrorismDeaths...