Claustrophobia has nothing to do with seat size. Imagine a failure mode where the power goes off, the screens die and all movement stops. And the only way to get out is someone on the outside with a power saw.
Imagine a present where every major building has a transportation device that crams a bunch of people into a tiny space, and has a failure mode where the power goes off, the lights go out and all movement stops. And everybody inside is trapped between floors with no personal space until rescued. Oh the claustrophobia! They're called elevators. I'm not a fan of them, but they seem to have caught on pretty well the last century or so.