With your theory in mind, of SLI divesting itself from those properties, and IGD gaining in value, would SLI then not be reduced in value? Then it would depend on IGD doing well and hopefully also SLI, in order for all the stocks we (the shareholders) then have in both companies, to do for us what we think SLI could do for us the way we have been imagining and calculating.
It may of course be fantastic if both companies (as per your theory) would do well, then we would hardly look back.
(just extrapolating and imagining)