This "airline guy" crap is really tiresome. Executive leadership is executive leadership, and there's nothing magical about trains that requires one to have spent their entire career in trains to make an effective leader of Amtrak.
Once upon a time, in a land far away, I was made the ASW Officer on my first ship. Didn't know the first thing about hunting submarines, but I had 30 well trained dudes that had done this their entire careers to handle that part of the job. My job was leadership, direction, and making sure my guys had what they needed to get the job done, and then get out of the way ant let them do it. 18 months into that tour, with my relief aboard and coming up to speed, the XO pulled me aside and said that I was going to A-gang. The auxiliary division owned everything in the engineering plant that wasn't propulsion, electricity, damage control, or poop. HP and LP air, water makers, chill water, all of the random equipment that makes a ship function,. Didn't know the first thing about that either, but the division was a hot mess, and a healthy dose of leadership was required. Second ship I was the Navigator - actually knew something about that from being a qualified watch officer on the bridge. Admin officer too, and I *really* didn't know jack about that job. The trend has continued in civilian life, jobs of increasing responsibility and scope of control, changing topics every few years. I don't know how to do the job that anyone that I supervise does, but that's what they are there to do. The leadership, direction, and making sure my people have what they needed to get the job done hasn't changed in 20 years.
Give me someone with good skills at the top, and I don't care what their background is. What matters is that they get the job done, even if they are an.... "airline guy"...