I don’t know about residential spaces but in commercial space, an area that you can be locked into is a no-no from a fire safety standpoint. This may be where their thinking is coming from regarding the deadbolts.

Also: I’m not sure how it works in your place, but if I install a deadbolt without my landlord’s approval, I’d need to replace the door when I moved out. Who owns the actual place you are in? Some private owner or the government?