Dude…Bobby Knight coached there!
Oh, please - “as far as I can tell”, “don’t appear to” - the reality is you don’t know. Admittedly, neither do I. You certainly can have a concrete or steel roof above a drop ceiling or drywall and you’d never know it, you certainly could have concrete and rebar behind tile or more drywall. Given that 99.99% of the time that “bunker” would be used for a purpose other than a storm shelter why wouldn’t you make it look nicer than bare concrete and steel?
I suspect that some of those storm shelters are built better than others. Unless you were present during construction, though, or can somehow get behind the facade the walls and ceiling could be anything or nothing.
The other reality is that the VAST MAJORITY of tornadoes are NOT the uber-twisters and the rest room facilities will function quite adequately to shield people.
True. But given what I CAN see in many of these public building safe rooms (namely, flimsy doors and walls that in places appear to be stacked cement block rather than poured concrete), why should I assume that the designated “shelter” meets FEMA standards?
True, but it’s the powerful tornadoes people most need to shelter against. An ordinary building is adequate protection from the weak ones, with or without a safe room.
That’s your answer.