I’m talking about R’ Shimon Bar Yochai and you are replying with cases of modern day gedolim. For our next step, lets compare the Airbus A380 to the plane the Wright brothers flew.
What is this source of this histadlut you are mentioning? You make it sound like a mitzvat aseh sheyesh ba karet. Look at Rashin in Beshalach (just before shevii) where he says that Yirmiah told the people to go to yeshivot and learn to avoid the charban.
How about by bait sheyni, where the gemara said they were told to do teshuva, only to have a person who had his own da’at torah burn down the wheat supply in order that Jews side with him and go out to fight.
Are you accusing Yermiah of not doing his proper hishtadlut?