I care as a Canadian that it is hard to compete with an uneven playing field, drive 30 miles south and airlines flights are much cheaper which makes it hard for Canadian airlines to compete.
On topic, there is the question about infrastructure costs for railroads vs airlines. If one industry is getting subsidized they have an unfair advantage. Eg, it has been mentioned here that railroads get hit up for property taxes in quite a few counties in the States so if airports don't have to pay taxes/rent on land, that is an advantage. Rail is a very efficient form of transport and for passenger service should easily be able to compete with airlines over shorter routes where the time savings from flying don't exist or are very minimal (including travel to airport, going through all the stuff before boarding and the reverse at the end of the trip).