His full reasoning wasn't reported on by Quanta, but an article in 2017 noted that faculty from the University of Michigan invited him to transfer after hearing his talk on his proof of Read's conjecture.
From the older article [0]: "Soon after he posted his proof of Read’s conjecture, the University of Michigan invited Huh to give a talk on his result. On December 3, 2010, he addressed a room full of many of the same mathematicians who had rejected his graduate school application a year earlier. By this point Huh’s talent was becoming evident to other mathematicians. Jesse Kass was a postdoctoral fellow in mathematics at Michigan at the time. Just before Huh’s visit, a senior faculty member encouraged Kass to watch the talk because '30 years from now you can tell your grandchildren you saw Huh speak before he got famous,' recalled Kass, who’s now a professor at the University of South Carolina.
"Huh’s lecture did not disappoint.
"'The talk was somehow very polished and very clear; it just went to the right points. It’s a bit unusual for a beginning graduate student to give such clean talks,' said Mircea Mustaţă, a mathematician at Michigan.
"Following his talk, the Michigan faculty invited Huh to transfer, which he did in 2011. By that point he’d learned that Read’s conjecture was a special case of a larger and more significant problem — the Rota conjecture.""
