No it wouldn't. Others are perfectly able to go by coach or car. Or perhaps someone who lives near or in the "away" town and suddenly finds they are free.The point of the exchange though would be that you only get money back if the ticket is sold and of course the train strikes would apply to anyone who is looking to buy your ticket!!!
It's a terrific idea, train strike or no, giving a second chance to non-super fans who can't all be logging into the ticket system at 8.59 to fill baskets up for their mates.