All it takes is a single actor paying off some guards to ‘fall asleep’, a camera to be disabled, and a 15 minute window of opportunity. It’s much more probable than something like the US Government planning 9/11 and somehow keeping thousands of co-conspirators silent.

I don’t really spend a whole lot of time thinking about it since as you said, we’ll never know for sure. It just seems at least probable if he actually did have kompromat on powerful people.