system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel, DC] Since typically most heroes are fit, can all of them get fat or are there some who are can't?

Also why would Hawkeye not believe that you have to be worthy to pick up Mjolnir? In Thor 1, he clearly sees the one point when Thor couldn't pick up the hammer.
gpt
Some superheroes (and villains) are endowed with "perfect" physical appearances, particularly the ones with supernatural or divine power sources like Wonder Woman and Thor. As a Greek Demigoddess with the blessing of Aphrodite, Wonder Woman isn't going to get pudgy no matter how many bacon double-cheeseburgers she eats. Likewise, Thor's Asgardian god physiology is immune to the ailment the people of Midgard call "obesity."

Supers like Captain Marvel (DC) or his nemesis Black Adam will also always be tall, buff, and handsome, because their powers come from transforming into that form. Even if Billy Batson grows up to weigh 500 pounds, his "Captain Marvel" form will still be endowed with the magic of the wizard Shazam.