That is my point. He was unarmed and watching porn. Why did they shoot him when they could have taken him alive?
Then what?
Bring him back here and give him a show-trial in NYC so he could wax lyrical on the witness stand about the evils of The Great Satan?
You need to familiarize yourself with the actual details of the raid. Flying in two helicopters over a long distance in the middle of the night penetrating Pakistani airspace without authorization and sending in personnel into a compound that presented plenty of unknowns was just the beginning. There was no way to know what kind of resistance there would be.
The SEALs encountered the residents in the compound's guest house, in the main building on the first floor where two adult males lived, and on the second and third floors where bin Laden lived with his family. The second and third floors were the last section of the compound to be cleared.
Osama bin Laden was killed in the raid, and initial versions said three other men and a woman were killed as well: bin Laden's adult son Khalid, bin Laden's courier (Abu Ahmed al-Kuwaiti), al-Kuwaiti's brother Abrar, and Abrar's wife Bushra.
The SEALs encountered bin Laden on the third floor of the main building. Bin Laden was "wearing the local loose-fitting tunic and pants known as a kurta paijama", which were later found to have €500 and two phone numbers sewn into the fabric.
Bin Laden peered through his bedroom door at the Americans advancing up the stairs, and then retreated into the room as the lead SEAL fired a shot at him, which either missed or hit him in the side. Robert O’Neill, who later publicly identified himself as the SEAL who shot bin Laden, rolled through the door and confronted bin Laden inside the bedroom.
O'Neill states that bin Laden was standing behind a woman with his hands on her shoulders, pushing her forward. O'Neill immediately shot bin Laden twice in the forehead, then once more as bin Laden crumpled to the floor. Matt Bissonnette, who entered the room at about the same time, also claims to have fired shots into bin Laden's fallen body.
Asking a SEAL to capture bin Laden at the risk of his own life is nonsense. There was no way to know if bin Laden had a suicide vest on. Or if the room was booby trapped in any way. The mission was not to capture bin Laden.