When it comes to anxiety there’s a big difference between being physically restrained and having to break a rule. My point was that in a Doom buggy you are usually not physically restrained (depending on the position of the lap bar) and it’s an open vehicle.
Ditto for being in a crowd of people in a small space where they could easily start to press in on each other, and an open area (although some people are afraid of both.)
Anyways, to the general point you’re making - sure, if I saw someone who had DAS for claustrophobia reride Mission Space 4 times, I would have questions. But even there, just that - questions. Maybe they have a fear of very specific small spaces due to PTSD where a traumatic memory can get triggered, for example. You can’t just apply a simple metric like “A person with X condition can never ever do Y thing.”