I have to assume a building like that has numerous ventilation systems in place and is automated so no one can forget to turn on a fan and have too much methane build up.
Of course the problem with automated systems no one has to remember to do is they’re more likely for nobody to remember to check. We live in an imperfect world, bolts fall out, just because nobody has to turn a fan on every day doesn’t mean somebody shouldn’t verify the fan is WORKING every day.