Oh. No-one is suggesting anything nefarious here.Of course there would be emergency exits most of the time (as per fire regulations), but they are usually far away from your usual things, via some back alleyway, well away from check in desk where the dragons are, so they may just say it's not worth it. Who knows. I'm not defending or criticising of them not letting people in, I'm just simply saying these things are a lot more complex, it's not 'just a door' and 'why not just push it open', and can be a bigger PITA than what people expect, having worked in that controls automation industry.
Thank you for the update.