I know, sometimes too much of commercialism impacts consciousness of a nation...Indian airlines should be prepared for Pakistan to ban its airspaces in long run as this kind of war like situation will be more frequest in nature even if we donot like to see it...
So it is always good to prepare for the bad times...Even if it is expensive and duration is long, still then they should have some contigency plan as it is not like, one airline is charging more while others airlines allowed to flow through Pakistan airspace...