Which is part of the problem; airlines and airports are subsidized, but traditionally, rail travel infrastructure is not; unlike interstate highways and airports, railway right of way and track are privately-owned. The vast majority of it is owned by freight companies, who, surprise, want to use it to move freight.
Actually, I am ALL for rail travel for short-run intercity routes, but if you are talking about going to Orlando, from say, Atlanta, you are not looking at that. Miami to Orlando, sure, but Atlanta is too far away in that model. Efficient intercity rail won't have in-between stops, it will only go point to point in major central cities that are no more than about 300 miles apart, unless there is a large market for business travel on a specific route.