I simplify to make my point.
Those big, out of town, out of favour hyper/supermarkets/parking spaces that still own their property, they could have some pretty valuable land if it could be passed for housing....
I recall, back in the day, Ken M liked to own his own properties before the smart guys appeared and said oh no, Opco and Propco is the future and so Propco gets spun off.
Sainsburys did the same, it seemed such a clever thing to do at the time.... what could go wrong, the SP is supported by our P/E not our boring tangible assets.