"-the fact that if there were no gifted there would be no blight creatures"

Eh? I thought the blight was doing just fine before the gifted ever showed up. As far as I can tell from the timeline, the Gift only came during the year 0 A.R. where as Torrin Macalir brought forth the withered Aegis in 254 B.R. There've only been gifted around for about 23 Istarian years.