What you’re saying is little different than what lots of liberals say: the concept that things which may have once been true are suddenly obsolete because “everything’s different now” and “we can’t turn back the clock.” But conservatives are supposed to believe in eternal and universal truths and principles.
The point is simply a change of tactics to fit the reality of the situation. Pragmatism at its best. A true conservative trait I believe.
Otherwise last one out get the lights.