No, that's not why Hohn's record is not the world record any more than "Hohn is not the current world record holder because he never threw the current implement." Or that "Zelezny never threw the old one." The world record is set according to the latest rules of the sport, and Hohn's throw did not meet the standard by definition. You clearly have no idea what the level of outperformance is of Jan Zelezny's record. It is by some stats evaluations more of an outlier than Bolt's 100m record. For the record, I am a former national-class thrower who has trained with the national record holder and had the opportunity to work a former world record holder on multiple occasions.