Naruto and DBZ are already part of global pop culture, as they are much more simple for the US audience to understand, they are the central place for "pop culture", both are basically about the fights with nearly zero worldbuilding, not just that, but OP design choice are too cartonish for the average anime edgy watcher and make much less impact with someone who isnt invested in the story.
When someone who have never watched both see a clip of a Pain/Madara/Itachi they look much more "cool" than a Kaido/Teach/Doffy.
Of course for someone used to the average shonen, OP is a breath of fresh air, as Oda is quite inovative with a lot of common tropes of the genre, yet for someone outside the commumity if much easier to enjoy watching Naruto and OP
When someone who have never watched both see a clip of a Pain/Madara/Itachi they look much more "cool" than a Kaido/Teach/Doffy.
Of course for someone used to the average shonen, OP is a breath of fresh air, as Oda is quite inovative with a lot of common tropes of the genre, yet for someone outside the commumity if much easier to enjoy watching Naruto and OP