Has a special power in the world, even more special than others (as we already seeing that the Gomu Gomu no Fruit was special by the WG and was being protected by CP9).
It's destined to saved the world, and you can try to talk you away around it as much as you want, but Luffy is 100% destined to do what he is doing, he was born at the right time to meet Shirahoshi, Vivi, Momo, Robin and all the other ones NECESSARY to finish the journey and unravel the One Piece / Void Century / Defeat the WG.
Has a bunch of ass pull power ups that come out of nowhere with no build up. Gear 2nd, Gear 3rd, Future Sight, Advanced Conqueror's and there's gonna be another one by the end of this arc.
All the One Piece Fandom that hated on Naruto for these things are a bunch of clowns right now, Naruto trained and learned all of his fucking power ups, they were built up and shown before, with the only exception being the 6 paths power he got on the end and lost it forever right after.