Ordinarily I'd agree with the claustrophobia point, but I feel like anyone who genuinely can't deal with a few seconds in a glass-walled airlock would never have managed getting on a plane in the first place.
As a matter of fact, my SO gets claustrophobia in revolving doors; she always refuses to go through them if there's another alternative, even the really big ones. She's fine on planes, however. I'm not sure whether these would give her the same sense of claustrophobia that revolving doors do.
