I believe it's just optics.
By the time a government collapses to where we can capture a foreign leader, they're no longer in their palaces with solid gold toilets. They're on the run, living in the street. Just a broken down old geezer in a spider hole now indistinguishable from your average street bum.
There's some arguments why we didn't just shoot Saddam in his spiderhole. Officially it's because we needed to interrogate him for info. Others more cynical believe we needed to clean him and fatten him back up from starvation so Hollywood would actually recognize it really was Saddam when he was executed.
Most likely, Bin Laden's appearance at the end, having been on the run for so many years and being over a decade older, was probably now shuffling around in sweat pants, flip flops and a grungy t-shirt, completely broken down and unrecognizable to Hollywood. Plus his wives screaming for pity probably didn't make good audio.
There's some that believe this is the US military transitioning to fourth generation warfare tactics --since 1995 enemy leadership like Gaddafi, Bin Laden and Saddam have become legitimate military targets instead of being hands-off as in previous conflicts.
There's a lot of internal controversy over this going on in the US military, since there is no official policy. It would be much easier if there was a press conference and some official said "The US military is now using 4th generation military tactics." No one has, and it's all "this wonky thinktank's position paper vs that wonky thinktank's position paper" reading which way the winds blow in Washington at the moment.
It may be only third world arab dictators get the 4th generation warfare treatment. It may be all future conflicts. No one knows. There's thousands of voices in the choir, and they're all singing different songs. Good luck making sense of Washington DC beltway politics.