Did you check on what patch this was? Did you run the same loot filter? `Did you make the same ammount of attempts per hour? did you kill the same ammount of enemies per hour? Did you run this for hundrets of hours to have a big enough sample size?
There are non rare items ingame that certain people have dozens of time that I’ve seen only 3 times in 1k hours of playtime. RNG in LE is a terrible thing and to me it looks like you are either lucky or shafted.
I have no clue how such a difference can happen if you anseweer most of the above questions with yes.