No, they're suggesting something more along the lines of Standard Oil being required to refine anyone's oil in their refinery, or carry it in their pipelines. But the one suggesting it didn't offer to let anyone stay in their house, and to me that's the same issue. Does the owner of private property get to control access and use, or not?
You say that the railroad is a business, not a private residence. All right, does Home Depot have to let Lowe's use part of their floor space? No, they don't.
Property owners generally don't have complete freedom to control access, hence easements.
Even if those weren't a thing, there's a coherent political view (which I'm not arguing for) that "resolves" the issue: nationalizing the infrastructure and licensing access back like the UK.
It's a strawman though. There's no reason anyone needs to hold identical political views on the property rights of private houses, home improvement stores, and rail infrastructure. They're different things.
You say that the railroad is a business, not a private residence. All right, does Home Depot have to let Lowe's use part of their floor space? No, they don't.