In order to believe that Luffy "owns" anyone, you have to undo your entire understanding of his character and his dynamic with friends
Goku picked Gohan to stop Cell and Gotenks to stop Boo.
Vegeta's entire story arc culminated into this moment. Zoro has put PK above his own dream, but concedes that the sacrifice is borne of friendship. You can laugh at that or whatever, I'm not triggered. But this is the biggest possible misunderstanding of the story in order to die on a cold hill in the middle of nowhere.