As it turns out it doesn’t actually cost that much on regular transit, there’s an AIRPORT SURCHARGE because it’s an “airport train”.
No wonder Americans don’t use public transit, even when the system exists it’s ridiculously difficult and expensive to use.
This is actually an extremely common design. Businesses will consider where most of their employees live, and try to consider the commute when moving, so placing themselves just off a highway or major road theoretically makes it easy for their employees to get there. Nevermind the fact that said major road/highway chokes up from every employee commuting to their convenient exit to get to/from work 5 days a week