Very simple use-case: a spy or a rookie can decide to deploy a structure in a corp that’s dedicated to being non-war-eligible, therefore turning the entire corp into a pumpkin, putting Jump Freighter fleets in danger and basically destroying the entire highsec logistics chain for the real wardeccable counterpart.
Please allow corp leadership to restrict deployment of structures only to certain players (or roles? not sure how that works in EVE).
I don’t know how many times people accidentally or maliciously did that, but I assume it happens more often than not.