He's a coward and I love it because him and Nanami are realistic as heck.
Think about it - you see the strongest beings, curses, children and things that would have a grown men and women shitting their pants (Sukuna) get wiped away like snot from a child's nose... AND THEN YOU'RE
TELLING ME THAT YOU WANNA GO TO BATTLE THAT VERY SAME INDIVIDUAL RESPONSIBLE FOR ALL OF THAT?
Nah, chief, lemme stay on the sidelines, too. At least I can eat my bowl of rice tomorrow, even if Sukuma destroys everything else in the world.
Miguel, as an African myself I'm begging your to go back home. I don't want to see you get packed up in a coffin instead of Gojo slapping you silly into concrete and every available surface in town like he did in the movie.
This is gonna be racial abuse PT. 2.