It’s the fact or otherwise of someone having carried raw meat in their luggage that I’m questioning, not the fact of customs officials caring about food moving across international borders. I’ve had fruit confiscated at a border, but meat in luggage seems like… a different paradigm.
If you packed it with an ice pack and dry ice to keep that pack cool, it could remain about frozen for the flight.
Unrefrigerated and in a suitcase is somehow the least-bad part about bushmeat.