This is a perfect example of path-dependent policy. Because the decision was to select for freight, other kinds of rail are "unfeasible". I'm using scare quotes to suggest that it's not really unfeasible, it's a choice.

And since trucking capacity has been maxed out in the US for quite a while (Amazon is the big mover for this situation, even before covid), you can bet this path dependence is biting us now.

https://en.wikipedia.org/wiki/Path_dependence