I didn't think they got OBL when I first heard about it. It is highly likely that OBL didn't survive Tora Bora. The Indian and Chinese press said that a squabble among bodyguards and others led to OBL and Mullah Omar getting shot but that Omar survived. Omar did, indeed, turn up some time later. OBL never did. When a tape came out as from OBL the CIA first doubted it then said something that, when parsed, meant well maybe so, or well, some people think so. That was my own take. I still think that whoever the unfortunate fellow was that Seal Tram 6 killed, it was not OBL. Politically OBL was indeed finished by the operation. I think the government/military kept him "alive" because were it made public that he was dead at Toa Bora the clamor domestically for the US to withdraw because we had Won The War would have been politically deafening and continuing it would have been politically very difficult.
OBL was never the reason we went into Afghanistan. Disrupting AQ and its fellow organizations and getting an American presence in Central Asia were very important and we needed OBL to stay alive while we did that. The kenyan wanted/wants to get out of Asia and to lay off his Islamist colleagues so OBL was "killed."
you sound like the author of the nutty “seal team six OBL operastion” conspiracy theory that Ms Barnhardt tried to spread - pure conspiracy theory speculation without a sshred of evidence and with zero support anywhere except fellow-travelers who, with similar lack of foundation, accept the same nutty belief