Earlier quoted context omitted.
You do realize that the bulked up guys probably weigh a lot more than you do so the number of achieved pull-ups is not an interesting measure? The really bulked-up ones most likely train for muscle mass, not for any useful activity.
Sure, they do weigh a lot more than I do. Isn't that part of the fair comparison? You don't give a cyclist or runner a backpack with weights in it because it's "unfair" that he weighs less than the other cyclist/runner. These guys were probably training pull ups every week at least, so it's on their home territory. Yet their training is less effective than running & cycling. For the vast majority of activities, perfo…
As it stands, all you've done is point out that there are different tasks and depending on your target task the ideal body composition and training routine differs.
If you want to be good at pullups you should probably let all your leg muscles atrophy and just build lats and biceps.