Extracting an 80 year old from their house is a bit harder than you might expect. Even if their stubborness is going to get them killed.

I personally have difficulty believing Iran didn't know that war was inbound, everyone I talk to was anticipating it within a roughly 3-week window and these are people just working off what they read on internet news. Khamenei might not have known he was going to die that day and if he had his family would probably have been elsewhere. But it seems pretty reasonable to assume that he was purposefully not raising his security in his final days. The narrative win of a calm death vs the perfidious Israeli attack is powerful enough that he must have considered it.

There is an understanding that the strike that took him out also took out a lot of visiting high-level leaders; that'd be quite strong evidence against the idea it was intentional. But the fog of war is thick and it doesn't seem safe to take that occurrence as a given yet.

> personally have difficulty believing Iran didn't know that war was inbound

Khamenei wasn't the only one killed in that meeting. All of the evidence points to Iran having expected America to attack at night. And in fact, that was the plan until we learned about that idiotic meeting.