All of what you say is correct, we will have to wait for official report to know reason for contact.
200LR and 300 ER wing span 212 ft 7 in
200, 300 and 200 ER wing span 199 ft 11 in
12 ft ..... two body lengths quite a good distance.
Worth considering wrong side of aircraft for a wing walker, everyone doing push out would have been blind sided by aircraft turning. Responsibility would have to have been with the taxiing aircraft.