That guy is straight up lying about being 3% body fat, lol.
But as an AnSci and Biology double major he's not wrong about the hormones and muscle gain. Luck has already peaked hormone, and physical wise so it's technically harder for his body to put on lean mass with minimal "fat" gain.
But the guy has world class staff, doctors, and fitness dudes so it's a non issue. It's not like he's 32+ years old yet. He'll be fine