Luffy said the same exact thing. He threw away his life to pursue to become the Pirate King. And both of them shares the same mentality to approach their goals.
One focuses to become the "strongest" swordsman
One focuses to become the "strongest"...
Also Luffy is dedicating his life to his pirate life.
One wants to dominate all swordsman
One wants to dominate all pirates
oh look at that ...
I am waiting for you to say that Zoro's case is different because its an object a sword. Do it i am ready