Joking aside, given Osama´s health (kidney) problems, it is likely that the (very) close location of two major hospitals is a factor in the location of the hideout.
Of course, it´s not likely that he was undergoing treatment so close to major military installations without the knowledge of the Pakistani military and intelligence services.
He was probably in the dialysis clinic twice a week.
I agree. His whereabouts would have been known by many people.