I would not be so pessimistic! Several people have argued in favour of Aegis and wards working just as other Container spells, including quite successfully you, and I've seen no argument against that except for "the LoH insert says so" 
But if for some reason every Aegis must be immobile within the frame of rerence of "absolute space" rather than within that of its own Boundary, yes, I agree. I would call the Major Hook simply "No Aegis", and it could apply for other reasons. For example, because it runs the risk of waking the local sleeping dragon.